22131232122031 has 4 divisors (see below), whose sum is σ = 22131241819864. Its totient is φ = 22131222424200.

The previous prime is 22131232122023. The next prime is 22131232122049. The reversal of 22131232122031 is 13022123213122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22131232122031 - 2³ = 22131232122023 is a prime.

It is a super-2 number, since 2×22131232122031² (a number of 27 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 = 22131232121987 and 22131232122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131232122061) 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, 661876 + ... + 6685846.

It is an arithmetic number, because the mean of its divisors is an integer number (5532810454966).

Almost surely, 2^{22131232122031} is an apocalyptic number.

22131232122031 is a deficient number, since it is larger than the sum of its proper divisors (9697833).

22131232122031 is an equidigital number, since it uses as much as digits as its factorization.

22131232122031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9697832.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 22131232122031 its reverse (13022123213122), we get a palindrome (35153355335153).

The spelling of 22131232122031 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred thirty-two million, one hundred twenty-two thousand, thirty-one".