22121320310231 has 4 divisors (see below), whose sum is σ = 22121340775464. Its totient is φ = 22121299845000.

The previous prime is 22121320310227. The next prime is 22121320310237. The reversal of 22121320310231 is 13201302312122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22121320310231 - 2² = 22121320310227 is a prime.

It is a super-2 number, since 2×22121320310231² (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 = 22121320310197 and 22121320310206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121320310237) 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, 8515145 + ... + 10805106.

It is an arithmetic number, because the mean of its divisors is an integer number (5530335193866).

Almost surely, 2^{22121320310231} is an apocalyptic number.

22121320310231 is a deficient number, since it is larger than the sum of its proper divisors (20465233).

22121320310231 is a wasteful number, since it uses less digits than its factorization.

22121320310231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20465232.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 22121320310231 its reverse (13201302312122), we get a palindrome (35322622622353).

The spelling of 22121320310231 in words is "twenty-two trillion, one hundred twenty-one billion, three hundred twenty million, three hundred ten thousand, two hundred thirty-one".