21163634130212 has 24 divisors (see below), whose sum is σ = 42327397674240. Its totient is φ = 9070101181440.

The previous prime is 21163634130187. The next prime is 21163634130217. The reversal of 21163634130212 is 21203143636112.

It is not an unprimeable number, because it can be changed into a prime (21163634130217) 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, 10084037 + ... + 12000627.

It is an arithmetic number, because the mean of its divisors is an integer number (1763641569760).

Almost surely, 2^{21163634130212} is an apocalyptic number.

It is an amenable number.

21163634130212 is an abundant number, since it is smaller than the sum of its proper divisors (21163763544028).

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

21163634130212 is a wasteful number, since it uses less digits than its factorization.

21163634130212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310971 (or 2310969 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 21163634130212 its reverse (21203143636112), we get a palindrome (42366777766324).

The spelling of 21163634130212 in words is "twenty-one trillion, one hundred sixty-three billion, six hundred thirty-four million, one hundred thirty thousand, two hundred twelve".