101115138 has 16 divisors (see below), whose sum is σ = 202606560. Its totient is φ = 33642336.

The previous prime is 101115137. The next prime is 101115173. The reversal of 101115138 is 831511101.

It is a happy number.

It is a super-2 number, since 2×101115138² = 20448542265518088, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (101115137) 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, 12123 + ... + 18686.

It is an arithmetic number, because the mean of its divisors is an integer number (12662910).

Almost surely, 2^101115138 is an apocalyptic number.

101115138 is an abundant number, since it is smaller than the sum of its proper divisors (101491422).

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

101115138 is a wasteful number, since it uses less digits than its factorization.

101115138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31361.

The product of its (nonzero) digits is 120, while the sum is 21.

The square root of 101115138 is about 10055.6023191055. The cubic root of 101115138 is about 465.8778468654.

Adding to 101115138 its reverse (831511101), we get a palindrome (932626239).

The spelling of 101115138 in words is "one hundred one million, one hundred fifteen thousand, one hundred thirty-eight".