21331130022 has 12 divisors (see below), whose sum is σ = 46217448420. Its totient is φ = 7110376668.

The previous prime is 21331130017. The next prime is 21331130059. The reversal of 21331130022 is 22003113312.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1185062779 = 21331130022 / (2 + 1 + 3 + 3 + 1 + 1 + 3 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 21331129977 and 21331130004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 592531372 + ... + 592531407.

It is an arithmetic number, because the mean of its divisors is an integer number (3851454035).

Almost surely, 2^21331130022 is an apocalyptic number.

21331130022 is an abundant number, since it is smaller than the sum of its proper divisors (24886318398).

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

21331130022 is a wasteful number, since it uses less digits than its factorization.

21331130022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185062787 (or 1185062784 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21331130022 its reverse (22003113312), we get a palindrome (43334243334).

The spelling of 21331130022 in words is "twenty-one billion, three hundred thirty-one million, one hundred thirty thousand, twenty-two".