121355325351 has 24 divisors (see below), whose sum is σ = 189335175120. Its totient is φ = 74458573056.

The previous prime is 121355325349. The next prime is 121355325359. The reversal of 121355325351 is 153523553121.

121355325351 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 553 + 2 + 53 + 51 = 666.

It is not a de Polignac number, because 121355325351 - 2¹ = 121355325349 is a prime.

It is a super-2 number, since 2×121355325351² (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 (121355325359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1499481 + ... + 1578338.

It is an arithmetic number, because the mean of its divisors is an integer number (7888965630).

Almost surely, 2^121355325351 is an apocalyptic number.

121355325351 is a deficient number, since it is larger than the sum of its proper divisors (67979849769).

121355325351 is a wasteful number, since it uses less digits than its factorization.

121355325351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078175 (or 3078172 counting only the distinct ones).

The product of its digits is 67500, while the sum is 36.

Adding to 121355325351 its reverse (153523553121), we get a palindrome (274878878472).

The spelling of 121355325351 in words is "one hundred twenty-one billion, three hundred fifty-five million, three hundred twenty-five thousand, three hundred fifty-one".