21311213123310 has 64 divisors (see below), whose sum is σ = 56742336380160. Its totient is φ = 5078789358080.

The previous prime is 21311213123287. The next prime is 21311213123339. The reversal of 21311213123310 is 1332131211312.

It is a super-2 number, since 2×21311213123310² (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 31 ways as a sum of consecutive naturals, for example, 547263867 + ... + 547302806.

It is an arithmetic number, because the mean of its divisors is an integer number (886599005940).

Almost surely, 2^{21311213123310} is an apocalyptic number.

21311213123310 is an abundant number, since it is smaller than the sum of its proper divisors (35431123256850).

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

21311213123310 is a wasteful number, since it uses less digits than its factorization.

21311213123310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094566753.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21311213123310 its reverse (1332131211312), we get a palindrome (22643344334622).

The spelling of 21311213123310 in words is "twenty-one trillion, three hundred eleven billion, two hundred thirteen million, one hundred twenty-three thousand, three hundred ten".