12220212231 has 16 divisors (see below), whose sum is σ = 18119140320. Its totient is φ = 8140003200.

The previous prime is 12220212229. The next prime is 12220212233. The reversal of 12220212231 is 13221202221.

12220212231 is a `hidden beast` number, since 1 + 2 + 220 + 212 + 231 = 666.

It is an interprime number because it is at equal distance from previous prime (12220212229) and next prime (12220212233).

It is not a de Polignac number, because 12220212231 - 2¹ = 12220212229 is a prime.

It is a super-2 number, since 2×12220212231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220212233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156000 + ... + 220853.

It is an arithmetic number, because the mean of its divisors is an integer number (1132446270).

Almost surely, 2^12220212231 is an apocalyptic number.

12220212231 is a deficient number, since it is larger than the sum of its proper divisors (5898928089).

12220212231 is a wasteful number, since it uses less digits than its factorization.

12220212231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378063 (or 378057 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12220212231 its reverse (13221202221), we get a palindrome (25441414452).

The spelling of 12220212231 in words is "twelve billion, two hundred twenty million, two hundred twelve thousand, two hundred thirty-one".