102112020111 has 4 divisors (see below), whose sum is σ = 136149360152. Its totient is φ = 68074680072.

The previous prime is 102112020107. The next prime is 102112020113. The reversal of 102112020111 is 111020211201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111020211201 = 3 ⋅37006737067.

It is not a de Polignac number, because 102112020111 - 2² = 102112020107 is a prime.

It is a super-2 number, since 2×102112020111² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102112020113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17018670016 + ... + 17018670021.

It is an arithmetic number, because the mean of its divisors is an integer number (34037340038).

Almost surely, 2^102112020111 is an apocalyptic number.

102112020111 is a deficient number, since it is larger than the sum of its proper divisors (34037340041).

102112020111 is an equidigital number, since it uses as much as digits as its factorization.

102112020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34037340040.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102112020111 its reverse (111020211201), we get a palindrome (213132231312).

The spelling of 102112020111 in words is "one hundred two billion, one hundred twelve million, twenty thousand, one hundred eleven".