31212030211320 has 64 divisors (see below), whose sum is σ = 107012675013120. Its totient is φ = 7134178333824.

The previous prime is 31212030211309. The next prime is 31212030211339. The reversal of 31212030211320 is 2311203021213.

It is a super-2 number, since 2×31212030211320² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18578588572 + ... + 18578590251.

It is an arithmetic number, because the mean of its divisors is an integer number (1672073047080).

Almost surely, 2^{31212030211320} is an apocalyptic number.

31212030211320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31212030211320 is an abundant number, since it is smaller than the sum of its proper divisors (75800644801800).

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

31212030211320 is a wasteful number, since it uses less digits than its factorization.

31212030211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37157178844 (or 37157178840 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31212030211320 its reverse (2311203021213), we get a palindrome (33523233232533).

The spelling of 31212030211320 in words is "thirty-one trillion, two hundred twelve billion, thirty million, two hundred eleven thousand, three hundred twenty".