22131221352123 has 32 divisors (see below), whose sum is σ = 32595052795200. Its totient is φ = 13272567160320.

The previous prime is 22131221352103. The next prime is 22131221352127. The reversal of 22131221352123 is 32125312213122.

It is not a de Polignac number, because 22131221352123 - 2³⁰ = 22130147610299 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 35621308 + ... + 36237273.

It is an arithmetic number, because the mean of its divisors is an integer number (1018595399850).

Almost surely, 2^{22131221352123} is an apocalyptic number.

22131221352123 is a deficient number, since it is larger than the sum of its proper divisors (10463831443077).

22131221352123 is a wasteful number, since it uses less digits than its factorization.

22131221352123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71858799.

The product of its digits is 8640, while the sum is 30.

Adding to 22131221352123 its reverse (32125312213122), we get a palindrome (54256533565245).

The spelling of 22131221352123 in words is "twenty-two trillion, one hundred thirty-one billion, two hundred twenty-one million, three hundred fifty-two thousand, one hundred twenty-three".