23121663351 has 16 divisors (see below), whose sum is σ = 31295741184. Its totient is φ = 15181113024.

The previous prime is 23121663329. The next prime is 23121663371. The reversal of 23121663351 is 15336612132.

It is not a de Polignac number, because 23121663351 - 2⁵ = 23121663319 is a prime.

It is a super-2 number, since 2×23121663351² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121663371) 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 15 ways as a sum of consecutive naturals, for example, 1240366 + ... + 1258868.

It is an arithmetic number, because the mean of its divisors is an integer number (1955983824).

Almost surely, 2^23121663351 is an apocalyptic number.

23121663351 is a deficient number, since it is larger than the sum of its proper divisors (8174077833).

23121663351 is a wasteful number, since it uses less digits than its factorization.

23121663351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24790.

The product of its digits is 19440, while the sum is 33.

The spelling of 23121663351 in words is "twenty-three billion, one hundred twenty-one million, six hundred sixty-three thousand, three hundred fifty-one".