102111122031 has 4 divisors (see below), whose sum is σ = 136148162712. Its totient is φ = 68074081352.

The previous prime is 102111121951. The next prime is 102111122063. The reversal of 102111122031 is 130221111201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102111122031 - 2¹⁷ = 102110990959 is a prime.

It is a super-2 number, since 2×102111122031² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102111122031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111122231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17018520336 + ... + 17018520341.

It is an arithmetic number, because the mean of its divisors is an integer number (34037040678).

Almost surely, 2^102111122031 is an apocalyptic number.

102111122031 is a deficient number, since it is larger than the sum of its proper divisors (34037040681).

102111122031 is an equidigital number, since it uses as much as digits as its factorization.

102111122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34037040680.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 102111122031 its reverse (130221111201), we get a palindrome (232332233232).

The spelling of 102111122031 in words is "one hundred two billion, one hundred eleven million, one hundred twenty-two thousand, thirty-one".