21122011210 has 64 divisors (see below), whose sum is σ = 39173621760. Its totient is φ = 8196736320.

The previous prime is 21122011201. The next prime is 21122011213. The reversal of 21122011210 is 1211022112.

It is a super-2 number, since 2×21122011210² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122011213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30566965 + ... + 30567655.

It is an arithmetic number, because the mean of its divisors is an integer number (612087840).

Almost surely, 2^21122011210 is an apocalyptic number.

21122011210 is a deficient number, since it is larger than the sum of its proper divisors (18051610550).

21122011210 is a wasteful number, since it uses less digits than its factorization.

21122011210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363.

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

Adding to 21122011210 its reverse (1211022112), we get a palindrome (22333033322).

The spelling of 21122011210 in words is "twenty-one billion, one hundred twenty-two million, eleven thousand, two hundred ten".