102012111111 has 16 divisors (see below), whose sum is σ = 142573939200. Its totient is φ = 64806329280.

The previous prime is 102012111077. The next prime is 102012111119. The reversal of 102012111111 is 111111210201.

It is a de Polignac number, because none of the positive numbers 2^k-102012111111 is a prime.

102012111111 is a modest number, since divided by 111111 gives 102012 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012111119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9638511 + ... + 9649088.

It is an arithmetic number, because the mean of its divisors is an integer number (8910871200).

Almost surely, 2^102012111111 is an apocalyptic number.

102012111111 is a deficient number, since it is larger than the sum of its proper divisors (40561828089).

102012111111 is a wasteful number, since it uses less digits than its factorization.

102012111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19287686.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 102012111111 its reverse (111111210201), we get a palindrome (213123321312).

The spelling of 102012111111 in words is "one hundred two billion, twelve million, one hundred eleven thousand, one hundred eleven".