21430022131 has 16 divisors (see below), whose sum is σ = 24847064064. Its totient is φ = 18102291264.

The previous prime is 21430022083. The next prime is 21430022143. The reversal of 21430022131 is 13122003412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21430022131 - 2²⁷ = 21295804403 is a prime.

It is a super-2 number, since 2×21430022131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21430022099 and 21430022108.

It is not an unprimeable number, because it can be changed into a prime (21430022161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639270 + ... + 671956.

It is an arithmetic number, because the mean of its divisors is an integer number (1552941504).

Almost surely, 2^21430022131 is an apocalyptic number.

21430022131 is a deficient number, since it is larger than the sum of its proper divisors (3417041933).

21430022131 is a wasteful number, since it uses less digits than its factorization.

21430022131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34050.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21430022131 its reverse (13122003412), we get a palindrome (34552025543).

The spelling of 21430022131 in words is "twenty-one billion, four hundred thirty million, twenty-two thousand, one hundred thirty-one".