21130232122212 has 24 divisors (see below), whose sum is σ = 51447521689536. Its totient is φ = 6737175459168.

The previous prime is 21130232122199. The next prime is 21130232122243. The reversal of 21130232122212 is 21222123203112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38279405743 + ... + 38279406294.

It is an arithmetic number, because the mean of its divisors is an integer number (2143646737064).

Almost surely, 2^{21130232122212} is an apocalyptic number.

It is an amenable number.

21130232122212 is an abundant number, since it is smaller than the sum of its proper divisors (30317289567324).

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

21130232122212 is a wasteful number, since it uses less digits than its factorization.

21130232122212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76558812067 (or 76558812065 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21130232122212 its reverse (21222123203112), we get a palindrome (42352355325324).

The spelling of 21130232122212 in words is "twenty-one trillion, one hundred thirty billion, two hundred thirty-two million, one hundred twenty-two thousand, two hundred twelve".