210031221020 has 24 divisors (see below), whose sum is σ = 441078359904. Its totient is φ = 84010051136.

The previous prime is 210031221011. The next prime is 210031221077. The reversal of 210031221020 is 20122130012.

It is a happy number.

210031221020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×210031221020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210031220986 and 210031221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 659942 + ... + 924978.

It is an arithmetic number, because the mean of its divisors is an integer number (18378264996).

Almost surely, 2^210031221020 is an apocalyptic number.

210031221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210031221020 is an abundant number, since it is smaller than the sum of its proper divisors (231047138884).

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

210031221020 is a wasteful number, since it uses less digits than its factorization.

210031221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304669 (or 304667 counting only the distinct ones).

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

Adding to 210031221020 its reverse (20122130012), we get a palindrome (230153351032).

The spelling of 210031221020 in words is "two hundred ten billion, thirty-one million, two hundred twenty-one thousand, twenty".