210111220210 has 16 divisors (see below), whose sum is σ = 391241583000. Its totient is φ = 81146402176.

The previous prime is 210111220183. The next prime is 210111220217. The reversal of 210111220210 is 12022111012.

It can be written as a sum of positive squares in 4 ways, for example, as 186260433241 + 23850786969 = 431579^2 + 154437^2 .

It is a super-2 number, since 2×210111220210² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (210111220217) 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, 362260435 + ... + 362261014.

Almost surely, 2^210111220210 is an apocalyptic number.

210111220210 is a deficient number, since it is larger than the sum of its proper divisors (181130362790).

210111220210 is a wasteful number, since it uses less digits than its factorization.

210111220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724521485.

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

Adding to 210111220210 its reverse (12022111012), we get a palindrome (222133331222).

The spelling of 210111220210 in words is "two hundred ten billion, one hundred eleven million, two hundred twenty thousand, two hundred ten".