101139210 has 48 divisors (see below), whose sum is σ = 269385480. Its totient is φ = 26311680.

The previous prime is 101139187. The next prime is 101139221. The reversal of 101139210 is 12931101.

It can be written as a sum of positive squares in 4 ways, for example, as 25918281 + 75220929 = 5091^2 + 8673^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10015 + ... + 17394.

Almost surely, 2^101139210 is an apocalyptic number.

101139210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101139210 is an abundant number, since it is smaller than the sum of its proper divisors (168246270).

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

101139210 is a wasteful number, since it uses less digits than its factorization.

101139210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27463 (or 27460 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 101139210 is about 10056.7991925861. The cubic root of 101139210 is about 465.9148137065.

The spelling of 101139210 in words is "one hundred one million, one hundred thirty-nine thousand, two hundred ten".