111022021987 has 2 divisors, whose sum is σ = 111022021988. Its totient is φ = 111022021986.

The previous prime is 111022021949. The next prime is 111022022011. The reversal of 111022021987 is 789120220111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111022021987 - 2³⁵ = 76662283619 is a prime.

It is a super-2 number, since 2×111022021987² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111022021927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55511010993 + 55511010994.

It is an arithmetic number, because the mean of its divisors is an integer number (55511010994).

Almost surely, 2^111022021987 is an apocalyptic number.

111022021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

111022021987 is an equidigital number, since it uses as much as digits as its factorization.

111022021987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 111022021987 in words is "one hundred eleven billion, twenty-two million, twenty-one thousand, nine hundred eighty-seven".