21000130223112 has 96 divisors (see below), whose sum is σ = 59108149245600. Its totient is φ = 6985053719424.

The previous prime is 21000130223089. The next prime is 21000130223113. The reversal of 21000130223112 is 21132203100012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21000130223113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10658037 + ... + 12473732.

It is an arithmetic number, because the mean of its divisors is an integer number (615709887975).

Almost surely, 2^{21000130223112} is an apocalyptic number.

It is an amenable number.

21000130223112 is an abundant number, since it is smaller than the sum of its proper divisors (38108019022488).

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

21000130223112 is a wasteful number, since it uses less digits than its factorization.

21000130223112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23132257 (or 23132241 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21000130223112 its reverse (21132203100012), we get a palindrome (42132333323124).

The spelling of 21000130223112 in words is "twenty-one trillion, one hundred thirty million, two hundred twenty-three thousand, one hundred twelve".