102012112111 has 12 divisors (see below), whose sum is σ = 127795393992. Its totient is φ = 80712879408.

The previous prime is 102012112099. The next prime is 102012112187. The reversal of 102012112111 is 111211210201.

It is a happy number.

It is not a de Polignac number, because 102012112111 - 2¹¹ = 102012110063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 102012112091 and 102012112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012118111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80071665 + ... + 80072938.

It is an arithmetic number, because the mean of its divisors is an integer number (10649616166).

Almost surely, 2^102012112111 is an apocalyptic number.

102012112111 is a deficient number, since it is larger than the sum of its proper divisors (25783281881).

102012112111 is a wasteful number, since it uses less digits than its factorization.

102012112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160144630 (or 160144623 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 102012112111 its reverse (111211210201), we get a palindrome (213223322312).

The spelling of 102012112111 in words is "one hundred two billion, twelve million, one hundred twelve thousand, one hundred eleven".