21130112210 has 8 divisors (see below), whose sum is σ = 38034201996. Its totient is φ = 8452044880.

The previous prime is 21130112197. The next prime is 21130112257. The reversal of 21130112210 is 1221103112.

It can be written as a sum of positive squares in 2 ways, for example, as 18681149041 + 2448963169 = 136679^2 + 49487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056505601 + ... + 1056505620.

Almost surely, 2^21130112210 is an apocalyptic number.

21130112210 is a deficient number, since it is larger than the sum of its proper divisors (16904089786).

21130112210 is a wasteful number, since it uses less digits than its factorization.

21130112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113011228.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21130112210 its reverse (1221103112), we get a palindrome (22351215322).

The spelling of 21130112210 in words is "twenty-one billion, one hundred thirty million, one hundred twelve thousand, two hundred ten".