21322302131 has 4 divisors (see below), whose sum is σ = 22962479232. Its totient is φ = 19682125032.

The previous prime is 21322302121. The next prime is 21322302137. The reversal of 21322302131 is 13120322312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21322302131 - 2²² = 21318107827 is a prime.

It is a super-2 number, since 2×21322302131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21322302137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820088531 + ... + 820088556.

It is an arithmetic number, because the mean of its divisors is an integer number (5740619808).

Almost surely, 2^21322302131 is an apocalyptic number.

21322302131 is a deficient number, since it is larger than the sum of its proper divisors (1640177101).

21322302131 is a wasteful number, since it uses less digits than its factorization.

21322302131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640177100.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21322302131 its reverse (13120322312), we get a palindrome (34442624443).

The spelling of 21322302131 in words is "twenty-one billion, three hundred twenty-two million, three hundred two thousand, one hundred thirty-one".