21422203131 has 24 divisors (see below), whose sum is σ = 34124290320. Its totient is φ = 11910411072.

The previous prime is 21422203129. The next prime is 21422203171. The reversal of 21422203131 is 13130222412.

It is not a de Polignac number, because 21422203131 - 2¹ = 21422203129 is a prime.

It is a super-2 number, since 2×21422203131² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21422203098 and 21422203107.

It is not an unprimeable number, because it can be changed into a prime (21422203171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1963876 + ... + 1974753.

It is an arithmetic number, because the mean of its divisors is an integer number (1421845430).

Almost surely, 2^21422203131 is an apocalyptic number.

21422203131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21422203131 is a deficient number, since it is larger than the sum of its proper divisors (12702087189).

21422203131 is a wasteful number, since it uses less digits than its factorization.

21422203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938683 (or 3938676 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21422203131 its reverse (13130222412), we get a palindrome (34552425543).

The spelling of 21422203131 in words is "twenty-one billion, four hundred twenty-two million, two hundred three thousand, one hundred thirty-one".