213021031000 has 64 divisors (see below), whose sum is σ = 498654468000. Its totient is φ = 85176745600.

The previous prime is 213021030979. The next prime is 213021031021. The reversal of 213021031000 is 130120312.

It is an interprime number because it is at equal distance from previous prime (213021030979) and next prime (213021031021).

It is a super-2 number, since 2×213021031000² (a number of 23 digits) contains 22 as substring.

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, 2750811 + ... + 2827189.

Almost surely, 2^213021031000 is an apocalyptic number.

213021031000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213021031000 is an abundant number, since it is smaller than the sum of its proper divisors (285633437000).

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

213021031000 is a wasteful number, since it uses less digits than its factorization.

213021031000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79189 (or 79175 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 213021031000 its reverse (130120312), we get a palindrome (213151151312).

The spelling of 213021031000 in words is "two hundred thirteen billion, twenty-one million, thirty-one thousand".