21130031022 has 8 divisors (see below), whose sum is σ = 42260062056. Its totient is φ = 7043343672.

The previous prime is 21130031009. The next prime is 21130031059. The reversal of 21130031022 is 22013003112.

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

21130031022 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21130030992 and 21130031010.

It is a congruent number.

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, 1760835913 + ... + 1760835924.

It is an arithmetic number, because the mean of its divisors is an integer number (5282507757).

Almost surely, 2^21130031022 is an apocalyptic number.

21130031022 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21130031022 is a wasteful number, since it uses less digits than its factorization.

21130031022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521671842.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21130031022 its reverse (22013003112), we get a palindrome (43143034134).

The spelling of 21130031022 in words is "twenty-one billion, one hundred thirty million, thirty-one thousand, twenty-two".