21304401023111 has 48 divisors (see below), whose sum is σ = 23712842999808. Its totient is φ = 19112959756800.

The previous prime is 21304401023093. The next prime is 21304401023167. The reversal of 21304401023111 is 11132010440312.

It is a de Polignac number, because none of the positive numbers 2^k-21304401023111 is a prime.

It is a super-2 number, since 2×21304401023111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21304401029111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 695229956 + ... + 695260598.

It is an arithmetic number, because the mean of its divisors is an integer number (494017562496).

Almost surely, 2^{21304401023111} is an apocalyptic number.

21304401023111 is a deficient number, since it is larger than the sum of its proper divisors (2408441976697).

21304401023111 is a wasteful number, since it uses less digits than its factorization.

21304401023111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31872 (or 31855 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21304401023111 its reverse (11132010440312), we get a palindrome (32436411463423).

The spelling of 21304401023111 in words is "twenty-one trillion, three hundred four billion, four hundred one million, twenty-three thousand, one hundred eleven".