21231233202 has 64 divisors (see below), whose sum is σ = 43794432000. Its totient is φ = 6858379200.

The previous prime is 21231233189. The next prime is 21231233209. The reversal of 21231233202 is 20233213212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21231233209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18445327 + ... + 18446477.

It is an arithmetic number, because the mean of its divisors is an integer number (684288000).

Almost surely, 2^21231233202 is an apocalyptic number.

21231233202 is an abundant number, since it is smaller than the sum of its proper divisors (22563198798).

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

21231233202 is a wasteful number, since it uses less digits than its factorization.

21231233202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21231233202 its reverse (20233213212), we get a palindrome (41464446414).

The spelling of 21231233202 in words is "twenty-one billion, two hundred thirty-one million, two hundred thirty-three thousand, two hundred two".