22131132021 has 12 divisors (see below), whose sum is σ = 31969611648. Its totient is φ = 14752970664.

The previous prime is 22131132017. The next prime is 22131132043. The reversal of 22131132021 is 12023113122.

It is not a de Polignac number, because 22131132021 - 2² = 22131132017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22131131985 and 22131132003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131132071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42766 + ... + 214688.

It is an arithmetic number, because the mean of its divisors is an integer number (2664134304).

Almost surely, 2^22131132021 is an apocalyptic number.

It is an amenable number.

22131132021 is a deficient number, since it is larger than the sum of its proper divisors (9838479627).

22131132021 is a wasteful number, since it uses less digits than its factorization.

22131132021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186232 (or 186229 counting only the distinct ones).

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

Adding to 22131132021 its reverse (12023113122), we get a palindrome (34154245143).

The spelling of 22131132021 in words is "twenty-two billion, one hundred thirty-one million, one hundred thirty-two thousand, twenty-one".