1220112231 has 24 divisors (see below), whose sum is σ = 1764608976. Its totient is φ = 749548800.

The previous prime is 1220112221. The next prime is 1220112233. The reversal of 1220112231 is 1322110221.

It is not a de Polignac number, because 1220112231 - 2⁵ = 1220112199 is a prime.

It is a super-2 number, since 2×1220112231² = 2977347712471594722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220112231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220112233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 353691 + ... + 357123.

It is an arithmetic number, because the mean of its divisors is an integer number (73525374).

Almost surely, 2^1220112231 is an apocalyptic number.

1220112231 is a deficient number, since it is larger than the sum of its proper divisors (544496745).

1220112231 is a wasteful number, since it uses less digits than its factorization.

1220112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4163 (or 4150 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1220112231 is about 34930.1049382907. The cubic root of 1220112231 is about 1068.5624947617.

Adding to 1220112231 its reverse (1322110221), we get a palindrome (2542222452).

The spelling of 1220112231 in words is "one billion, two hundred twenty million, one hundred twelve thousand, two hundred thirty-one".