212021131020 has 24 divisors (see below), whose sum is σ = 593659167024. Its totient is φ = 56538968256.

The previous prime is 212021131001. The next prime is 212021131027. The reversal of 212021131020 is 20131120212.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (212021131027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1766842699 + ... + 1766842818.

It is an arithmetic number, because the mean of its divisors is an integer number (24735798626).

Almost surely, 2^212021131020 is an apocalyptic number.

212021131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021131020 is an abundant number, since it is smaller than the sum of its proper divisors (381638036004).

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

212021131020 is a wasteful number, since it uses less digits than its factorization.

212021131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533685529 (or 3533685527 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212021131020 its reverse (20131120212), we get a palindrome (232152251232).

The spelling of 212021131020 in words is "two hundred twelve billion, twenty-one million, one hundred thirty-one thousand, twenty".