23121434330511 has 32 divisors (see below), whose sum is σ = 35683823462400. Its totient is φ = 13161162977280.

The previous prime is 23121434330503. The next prime is 23121434330521. The reversal of 23121434330511 is 11503343412132.

It is not a de Polignac number, because 23121434330511 - 2³ = 23121434330503 is a prime.

It is a super-2 number, since 2×23121434330511² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121434330521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42752866 + ... + 43290303.

It is an arithmetic number, because the mean of its divisors is an integer number (1115119483200).

Almost surely, 2^{23121434330511} is an apocalyptic number.

23121434330511 is a deficient number, since it is larger than the sum of its proper divisors (12562389131889).

23121434330511 is a wasteful number, since it uses less digits than its factorization.

23121434330511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86043679.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 23121434330511 its reverse (11503343412132), we get a palindrome (34624777742643).

The spelling of 23121434330511 in words is "twenty-three trillion, one hundred twenty-one billion, four hundred thirty-four million, three hundred thirty thousand, five hundred eleven".