21022132131 has 48 divisors (see below), whose sum is σ = 40770213120. Its totient is φ = 10080538560.

The previous prime is 21022132123. The next prime is 21022132147. The reversal of 21022132131 is 13123122012.

It is not a de Polignac number, because 21022132131 - 2³ = 21022132123 is a prime.

It is a super-2 number, since 2×21022132131² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022132031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1157721 + ... + 1175738.

It is an arithmetic number, because the mean of its divisors is an integer number (849379440).

Almost surely, 2^21022132131 is an apocalyptic number.

21022132131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21022132131 is a deficient number, since it is larger than the sum of its proper divisors (19748080989).

21022132131 is a wasteful number, since it uses less digits than its factorization.

21022132131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2333496 (or 2333493 counting only the distinct ones).

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

Adding to 21022132131 its reverse (13123122012), we get a palindrome (34145254143).

The spelling of 21022132131 in words is "twenty-one billion, twenty-two million, one hundred thirty-two thousand, one hundred thirty-one".