101200100138 has 4 divisors (see below), whose sum is σ = 151800150210. Its totient is φ = 50600050068.

The previous prime is 101200100137. The next prime is 101200100149. The reversal of 101200100138 is 831001002101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63636621169 + 37563478969 = 252263^2 + 193813^2 .

It is not an unprimeable number, because it can be changed into a prime (101200100137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25300025033 + ... + 25300025036.

Almost surely, 2^101200100138 is an apocalyptic number.

101200100138 is a deficient number, since it is larger than the sum of its proper divisors (50600050072).

101200100138 is an equidigital number, since it uses as much as digits as its factorization.

101200100138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50600050071.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 101200100138 its reverse (831001002101), we get a palindrome (932201102239).

The spelling of 101200100138 in words is "one hundred one billion, two hundred million, one hundred thousand, one hundred thirty-eight".