12212223231 has 16 divisors (see below), whose sum is σ = 17538627456. Its totient is φ = 7513874016.

The previous prime is 12212223227. The next prime is 12212223251. The reversal of 12212223231 is 13232221221.

It is not a de Polignac number, because 12212223231 - 2² = 12212223227 is a prime.

It is a super-2 number, since 2×12212223231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12212223198 and 12212223207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212223211) 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, 221836 + ... + 271358.

It is an arithmetic number, because the mean of its divisors is an integer number (1096164216).

Almost surely, 2^12212223231 is an apocalyptic number.

12212223231 is a deficient number, since it is larger than the sum of its proper divisors (5326404225).

12212223231 is a wasteful number, since it uses less digits than its factorization.

12212223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55862.

The product of its digits is 576, while the sum is 21.

Adding to 12212223231 its reverse (13232221221), we get a palindrome (25444444452).

The spelling of 12212223231 in words is "twelve billion, two hundred twelve million, two hundred twenty-three thousand, two hundred thirty-one".