21133323210 has 32 divisors (see below), whose sum is σ = 50737104000. Its totient is φ = 5633649728.

The previous prime is 21133323209. The next prime is 21133323241. The reversal of 21133323210 is 1232333112.

It is a Curzon number.

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, 27477 + ... + 207416.

It is an arithmetic number, because the mean of its divisors is an integer number (1585534500).

Almost surely, 2^21133323210 is an apocalyptic number.

21133323210 is an abundant number, since it is smaller than the sum of its proper divisors (29603780790).

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

21133323210 is a wasteful number, since it uses less digits than its factorization.

21133323210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237902.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21133323210 its reverse (1232333112), we get a palindrome (22365656322).

The spelling of 21133323210 in words is "twenty-one billion, one hundred thirty-three million, three hundred twenty-three thousand, two hundred ten".