111201220120031 has 2 divisors, whose sum is σ = 111201220120032. Its totient is φ = 111201220120030.

The previous prime is 111201220120021. The next prime is 111201220120087. The reversal of 111201220120031 is 130021022102111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111201220120031 - 2¹⁸ = 111201219857887 is a prime.

It is a super-2 number, since 2×111201220120031² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 111201220119991 and 111201220120009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111201220120021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55600610060015 + 55600610060016.

It is an arithmetic number, because the mean of its divisors is an integer number (55600610060016).

Almost surely, 2^{111201220120031} is an apocalyptic number.

111201220120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

111201220120031 is an equidigital number, since it uses as much as digits as its factorization.

111201220120031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 111201220120031 its reverse (130021022102111), we get a palindrome (241222242222142).

The spelling of 111201220120031 in words is "one hundred eleven trillion, two hundred one billion, two hundred twenty million, one hundred twenty thousand, thirty-one".