11112120031 has 2 divisors, whose sum is σ = 11112120032. Its totient is φ = 11112120030.

The previous prime is 11112120007. The next prime is 11112120067. The reversal of 11112120031 is 13002121111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11112120031 - 2⁹ = 11112119519 is a prime.

It is a super-2 number, since 2×11112120031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11112119993 and 11112120020.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112120631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556060015 + 5556060016.

It is an arithmetic number, because the mean of its divisors is an integer number (5556060016).

Almost surely, 2^11112120031 is an apocalyptic number.

11112120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112120031 is an equidigital number, since it uses as much as digits as its factorization.

11112120031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11112120031 its reverse (13002121111), we get a palindrome (24114241142).

The spelling of 11112120031 in words is "eleven billion, one hundred twelve million, one hundred twenty thousand, thirty-one".