212311331020 has 48 divisors (see below), whose sum is σ = 485503250400. Its totient is φ = 77680512000.

The previous prime is 212311331017. The next prime is 212311331021. The reversal of 212311331020 is 20133113212.

It is a super-2 number, since 2×212311331020² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (212311331021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9621981 + ... + 9644020.

It is an arithmetic number, because the mean of its divisors is an integer number (10114651050).

Almost surely, 2^212311331020 is an apocalyptic number.

212311331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212311331020 is an abundant number, since it is smaller than the sum of its proper divisors (273191919380).

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

212311331020 is a wasteful number, since it uses less digits than its factorization.

212311331020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19266058 (or 19266056 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 212311331020 its reverse (20133113212), we get a palindrome (232444444232).

The spelling of 212311331020 in words is "two hundred twelve billion, three hundred eleven million, three hundred thirty-one thousand, twenty".