21311323133310 has 48 divisors (see below), whose sum is σ = 63325074455136. Its totient is φ = 4871159573184.

The previous prime is 21311323133279. The next prime is 21311323133351. The reversal of 21311323133310 is 1333132311312.

21311323133310 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 1 + 32 + 313 + 3 + 310 = 666.

It is a super-2 number, since 2×21311323133310² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16913747889 + ... + 16913749148.

It is an arithmetic number, because the mean of its divisors is an integer number (1319272384482).

Almost surely, 2^{21311323133310} is an apocalyptic number.

21311323133310 is an abundant number, since it is smaller than the sum of its proper divisors (42013751321826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21311323133310 is a wasteful number, since it uses less digits than its factorization.

21311323133310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33827497057 (or 33827497054 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

Adding to 21311323133310 its reverse (1333132311312), we get a palindrome (22644455444622).

The spelling of 21311323133310 in words is "twenty-one trillion, three hundred eleven billion, three hundred twenty-three million, one hundred thirty-three thousand, three hundred ten".