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121113133 = 971248589
BaseRepresentation
bin1110011100000…
…00101000101101
322102220011222121
413032000220231
5222001110013
620003512541
73000305341
oct716005055
9272804877
10121113133
11624020a9
1234688751
131c12679b
1412129621
15a97558d
hex7380a2d

121113133 has 4 divisors (see below), whose sum is σ = 122361820. Its totient is φ = 119864448.

The previous prime is 121113119. The next prime is 121113137. The reversal of 121113133 is 331311121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331311121 = 2391386239.

It can be written as a sum of positive squares in 2 ways, for example, as 98664489 + 22448644 = 9933^2 + 4738^2 .

It is a cyclic number.

It is not a de Polignac number, because 121113133 - 225 = 87558701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121113137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624198 + ... + 624391.

It is an arithmetic number, because the mean of its divisors is an integer number (30590455).

Almost surely, 2121113133 is an apocalyptic number.

It is an amenable number.

121113133 is a deficient number, since it is larger than the sum of its proper divisors (1248687).

121113133 is an equidigital number, since it uses as much as digits as its factorization.

121113133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248686.

The product of its digits is 54, while the sum is 16.

The square root of 121113133 is about 11005.1412076356. The cubic root of 121113133 is about 494.7628466407.

Adding to 121113133 its reverse (331311121), we get a palindrome (452424254).

The spelling of 121113133 in words is "one hundred twenty-one million, one hundred thirteen thousand, one hundred thirty-three".

Divisors: 1 97 1248589 121113133