213212021000 has 64 divisors (see below), whose sum is σ = 544272168960. Its totient is φ = 77531640000.

The previous prime is 213212020993. The next prime is 213212021017. The reversal of 213212021000 is 120212312.

It is a happy 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, 9680456 + ... + 9702455.

It is an arithmetic number, because the mean of its divisors is an integer number (8504252640).

Almost surely, 2^213212021000 is an apocalyptic number.

213212021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213212021000 is an abundant number, since it is smaller than the sum of its proper divisors (331060147960).

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

213212021000 is a wasteful number, since it uses less digits than its factorization.

213212021000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19382943 (or 19382929 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 213212021000 its reverse (120212312), we get a palindrome (213332233312).

The spelling of 213212021000 in words is "two hundred thirteen billion, two hundred twelve million, twenty-one thousand".