22131221352126 has 16 divisors (see below), whose sum is σ = 44266687812864. Its totient is φ = 7376366265944.

The previous prime is 22131221352103. The next prime is 22131221352127. The reversal of 22131221352126 is 62125312213122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131221352127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176811750 + ... + 176936873.

It is an arithmetic number, because the mean of its divisors is an integer number (2766667988304).

Almost surely, 2^{22131221352126} is an apocalyptic number.

22131221352126 is an abundant number, since it is smaller than the sum of its proper divisors (22135466460738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22131221352126 is a wasteful number, since it uses less digits than its factorization.

22131221352126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353759055.

The product of its digits is 17280, while the sum is 33.

Adding to 22131221352126 its reverse (62125312213122), we get a palindrome (84256533565248).

The spelling of 22131221352126 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred twenty-one million, three hundred fifty-two thousand, one hundred twenty-six".