121552041231 has 8 divisors (see below), whose sum is σ = 180077098160. Its totient is φ = 81034694136.

The previous prime is 121552041181. The next prime is 121552041269. The reversal of 121552041231 is 132140255121.

It is a happy number.

121552041231 is a `hidden beast` number, since 1 + 2 + 15 + 520 + 4 + 123 + 1 = 666.

It is not a de Polignac number, because 121552041231 - 2⁷ = 121552041103 is a prime.

It is a super-2 number, since 2×121552041231² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4501927453 = 121552041231 / (1 + 2 + 1 + 5 + 5 + 2 + 0 + 4 + 1 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121552041195 and 121552041204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121552041431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2250963700 + ... + 2250963753.

It is an arithmetic number, because the mean of its divisors is an integer number (22509637270).

Almost surely, 2^121552041231 is an apocalyptic number.

121552041231 is a deficient number, since it is larger than the sum of its proper divisors (58525056929).

121552041231 is an equidigital number, since it uses as much as digits as its factorization.

121552041231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501927462 (or 4501927456 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

Adding to 121552041231 its reverse (132140255121), we get a palindrome (253692296352).

The spelling of 121552041231 in words is "one hundred twenty-one billion, five hundred fifty-two million, forty-one thousand, two hundred thirty-one".