111212108023931 has 2 divisors, whose sum is σ = 111212108023932. Its totient is φ = 111212108023930.

The previous prime is 111212108023901. The next prime is 111212108023949. The reversal of 111212108023931 is 139320801212111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111212108023931 - 2¹⁰ = 111212108022907 is a prime.

It is a super-2 number, since 2×111212108023931² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111212108023891 and 111212108023900.

It is not a weakly prime, because it can be changed into another prime (111212108023901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606054011965 + 55606054011966.

It is an arithmetic number, because the mean of its divisors is an integer number (55606054011966).

Almost surely, 2^{111212108023931} is an apocalyptic number.

111212108023931 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212108023931 is an equidigital number, since it uses as much as digits as its factorization.

111212108023931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 111212108023931 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred eight million, twenty-three thousand, nine hundred thirty-one".