121315122351 has 12 divisors (see below), whose sum is σ = 182851778928. Its totient is φ = 77360367744.

The previous prime is 121315122281. The next prime is 121315122359. The reversal of 121315122351 is 153221513121.

121315122351 is a `hidden beast` number, since 12 + 131 + 512 + 2 + 3 + 5 + 1 = 666.

It is not a de Polignac number, because 121315122351 - 2¹⁵ = 121315089583 is a prime.

It is a super-2 number, since 2×121315122351² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121315122359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293031490 + ... + 293031903.

It is an arithmetic number, because the mean of its divisors is an integer number (15237648244).

Almost surely, 2^121315122351 is an apocalyptic number.

121315122351 is a deficient number, since it is larger than the sum of its proper divisors (61536656577).

121315122351 is a wasteful number, since it uses less digits than its factorization.

121315122351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586063422 (or 586063419 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

Adding to 121315122351 its reverse (153221513121), we get a palindrome (274536635472).

The spelling of 121315122351 in words is "one hundred twenty-one billion, three hundred fifteen million, one hundred twenty-two thousand, three hundred fifty-one".