1220112203231 has 16 divisors (see below), whose sum is σ = 1298930220000. Its totient is φ = 1142757766656.

The previous prime is 1220112203221. The next prime is 1220112203279. The reversal of 1220112203231 is 1323022110221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220112203231 is a prime.

It is a super-2 number, since 2×1220112203231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220112203201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14041025 + ... + 14127653.

It is an arithmetic number, because the mean of its divisors is an integer number (81183138750).

Almost surely, 2^{1220112203231} is an apocalyptic number.

1220112203231 is a deficient number, since it is larger than the sum of its proper divisors (78818016769).

1220112203231 is an equidigital number, since it uses as much as digits as its factorization.

1220112203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95066.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1220112203231 its reverse (1323022110221), we get a palindrome (2543134313452).

The spelling of 1220112203231 in words is "one trillion, two hundred twenty billion, one hundred twelve million, two hundred three thousand, two hundred thirty-one".