21133211210 has 16 divisors (see below), whose sum is σ = 39693684096. Its totient is φ = 8085750288.

The previous prime is 21133211201. The next prime is 21133211251. The reversal of 21133211210 is 1211233112.

It is a super-2 number, since 2×21133211210² (a number of 21 digits) contains 22 as substring.

It is a Curzon 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, 45941534 + ... + 45941993.

It is an arithmetic number, because the mean of its divisors is an integer number (2480855256).

Almost surely, 2^21133211210 is an apocalyptic number.

21133211210 is a deficient number, since it is larger than the sum of its proper divisors (18560472886).

21133211210 is a wasteful number, since it uses less digits than its factorization.

21133211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91883557.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21133211210 its reverse (1211233112), we get a palindrome (22344444322).

The spelling of 21133211210 in words is "twenty-one billion, one hundred thirty-three million, two hundred eleven thousand, two hundred ten".