210221101210 has 32 divisors (see below), whose sum is σ = 414472444560. Its totient is φ = 76413023232.

The previous prime is 210221101169. The next prime is 210221101231. The reversal of 210221101210 is 12101122012.

It can be written as a sum of positive squares in 8 ways, for example, as 81834328489 + 128386772721 = 286067^2 + 358311^2 .

It is a super-2 number, since 2×210221101210² (a number of 23 digits) contains 22 as substring.

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, 21315669 + ... + 21325528.

Almost surely, 2^210221101210 is an apocalyptic number.

210221101210 is a deficient number, since it is larger than the sum of its proper divisors (204251343350).

210221101210 is a wasteful number, since it uses less digits than its factorization.

210221101210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42641250.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 210221101210 its reverse (12101122012), we get a palindrome (222322223222).

The spelling of 210221101210 in words is "two hundred ten billion, two hundred twenty-one million, one hundred one thousand, two hundred ten".