12220131 has 16 divisors (see below), whose sum is σ = 20314368. Its totient is φ = 6348000.

The previous prime is 12220129. The next prime is 12220147. The reversal of 12220131 is 13102221.

It is not a de Polignac number, because 12220131 - 2¹ = 12220129 is a prime.

It is a super-2 number, since 2×12220131² = 298663203314322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12220111) by changing a digit.

It is a nontrivial repunit in base 230.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26220 + ... + 26681.

It is an arithmetic number, because the mean of its divisors is an integer number (1269648).

Almost surely, 2^12220131 is an apocalyptic number.

12220131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12220131 is a deficient number, since it is larger than the sum of its proper divisors (8094237).

12220131 is a wasteful number, since it uses less digits than its factorization.

12220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52922.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12220131 is about 3495.7303957828. The cubic root of 12220131 is about 230.3343027686.

Adding to 12220131 its reverse (13102221), we get a palindrome (25322352).

The spelling of 12220131 in words is "twelve million, two hundred twenty thousand, one hundred thirty-one".