111221223000031 has 12 divisors (see below), whose sum is σ = 117399126466200. Its totient is φ = 105353055794448.

The previous prime is 111221222999923. The next prime is 111221223000073. The reversal of 111221223000031 is 130000322122111.

It is not a de Polignac number, because 111221223000031 - 2⁷ = 111221222999903 is a prime.

It is a super-2 number, since 2×111221223000031² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111221222999972 and 111221223000008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221223000431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18437661 + ... + 23714758.

It is an arithmetic number, because the mean of its divisors is an integer number (9783260538850).

Almost surely, 2^{111221223000031} is an apocalyptic number.

111221223000031 is a deficient number, since it is larger than the sum of its proper divisors (6177903466169).

111221223000031 is an equidigital number, since it uses as much as digits as its factorization.

111221223000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42159766 (or 42159747 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111221223000031 its reverse (130000322122111), we get a palindrome (241221545122142).

The spelling of 111221223000031 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-three million, thirty-one", and thus it is an aban number.