21232002010 has 24 divisors (see below), whose sum is σ = 40334929236. Its totient is φ = 8045809920.

The previous prime is 21232001993. The next prime is 21232002013. The reversal of 21232002010 is 1020023212.

It can be written as a sum of positive squares in 2 ways, for example, as 20648827809 + 583174201 = 143697^2 + 24149^2 .

It is not an unprimeable number, because it can be changed into a prime (21232002013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2937111 + ... + 2944330.

Almost surely, 2^21232002010 is an apocalyptic number.

21232002010 is a deficient number, since it is larger than the sum of its proper divisors (19102927226).

21232002010 is a wasteful number, since it uses less digits than its factorization.

21232002010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5881486 (or 5881467 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21232002010 its reverse (1020023212), we get a palindrome (22252025222).

The spelling of 21232002010 in words is "twenty-one billion, two hundred thirty-two million, two thousand, ten".