21031201211310 has 48 divisors (see below), whose sum is σ = 54681361759440. Its totient is φ = 5608295850240.

The previous prime is 21031201211297. The next prime is 21031201211329. The reversal of 21031201211310 is 1311210213012.

21031201211310 is a `hidden beast` number, since 21 + 0 + 3 + 120 + 1 + 211 + 310 = 666.

It is a super-2 number, since 2×21031201211310² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 30964150 + ... + 31636070.

It is an arithmetic number, because the mean of its divisors is an integer number (1139195036655).

Almost surely, 2^{21031201211310} is an apocalyptic number.

21031201211310 is an abundant number, since it is smaller than the sum of its proper divisors (33650160548130).

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

21031201211310 is a wasteful number, since it uses less digits than its factorization.

21031201211310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019713 (or 1019710 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21031201211310 its reverse (1311210213012), we get a palindrome (22342411424322).

The spelling of 21031201211310 in words is "twenty-one trillion, thirty-one billion, two hundred one million, two hundred eleven thousand, three hundred ten".