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121333331231 = 717333333033
BaseRepresentation
bin111000100000000000…
…1111011010100011111
3102121011221001212002122
41301000001323110133
53441442313044411
6131423442213155
711523516204320
oct1610001732437
9377157055078
10121333331231
1147503558662
121b6223541bb
13b5984c2668
145c30462447
15325207b9db
hex1c4007b51f

121333331231 has 4 divisors (see below), whose sum is σ = 138666664272. Its totient is φ = 103999998192.

The previous prime is 121333331179. The next prime is 121333331239. The reversal of 121333331231 is 132133333121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121333331231 - 222 = 121329136927 is a prime.

It is a super-2 number, since 2×1213333312312 (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121333331231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333331239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8666666510 + ... + 8666666523.

It is an arithmetic number, because the mean of its divisors is an integer number (34666666068).

Almost surely, 2121333331231 is an apocalyptic number.

121333331231 is a deficient number, since it is larger than the sum of its proper divisors (17333333041).

121333331231 is an equidigital number, since it uses as much as digits as its factorization.

121333331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333333040.

The product of its digits is 2916, while the sum is 26.

Adding to 121333331231 its reverse (132133333121), we get a palindrome (253466664352).

The spelling of 121333331231 in words is "one hundred twenty-one billion, three hundred thirty-three million, three hundred thirty-one thousand, two hundred thirty-one".

Divisors: 1 7 17333333033 121333331231