102111201138 has 16 divisors (see below), whose sum is σ = 204357577536. Its totient is φ = 34014537840.

The previous prime is 102111201119. The next prime is 102111201139. The reversal of 102111201138 is 831102111201.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102111201139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5622481 + ... + 5640612.

It is an arithmetic number, because the mean of its divisors is an integer number (12772348596).

Almost surely, 2^102111201138 is an apocalyptic number.

102111201138 is an abundant number, since it is smaller than the sum of its proper divisors (102246376398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102111201138 is a wasteful number, since it uses less digits than its factorization.

102111201138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11264609.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 102111201138 its reverse (831102111201), we get a palindrome (933213312339).

The spelling of 102111201138 in words is "one hundred two billion, one hundred eleven million, two hundred one thousand, one hundred thirty-eight".