21131231298 has 16 divisors (see below), whose sum is σ = 42264551520. Its totient is φ = 7043395616.

The previous prime is 21131231291. The next prime is 21131231299. The reversal of 21131231298 is 89213213112.

It is not an unprimeable number, because it can be changed into a prime (21131231291) 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, 64861 + ... + 215567.

It is an arithmetic number, because the mean of its divisors is an integer number (2641534470).

Almost surely, 2^21131231298 is an apocalyptic number.

21131231298 is an abundant number, since it is smaller than the sum of its proper divisors (21133320222).

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

21131231298 is a wasteful number, since it uses less digits than its factorization.

21131231298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174081.

The product of its digits is 5184, while the sum is 33.

The spelling of 21131231298 in words is "twenty-one billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred ninety-eight".