21130012210 has 16 divisors (see below), whose sum is σ = 38036679192. Its totient is φ = 8451414400.

The previous prime is 21130012201. The next prime is 21130012217. The reversal of 21130012210 is 1221003112.

It can be written as a sum of positive squares in 4 ways, for example, as 11606399289 + 9523612921 = 107733^2 + 97589^2 .

It is not an unprimeable number, because it can be changed into a prime (21130012217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94830 + ... + 226390.

Almost surely, 2^21130012210 is an apocalyptic number.

21130012210 is a deficient number, since it is larger than the sum of its proper divisors (16906666982).

21130012210 is a wasteful number, since it uses less digits than its factorization.

21130012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147629.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21130012210 its reverse (1221003112), we get a palindrome (22351015322).

The spelling of 21130012210 in words is "twenty-one billion, one hundred thirty million, twelve thousand, two hundred ten".