101199980 has 96 divisors (see below), whose sum is σ = 260330112. Its totient is φ = 32256000.

The previous prime is 101199979. The next prime is 101200007. The reversal of 101199980 is 89991101.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240170 + ... + 240590.

It is an arithmetic number, because the mean of its divisors is an integer number (2711772).

Almost surely, 2^101199980 is an apocalyptic number.

101199980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101199980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130165056).

101199980 is an abundant number, since it is smaller than the sum of its proper divisors (159130132).

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

101199980 is a wasteful number, since it uses less digits than its factorization.

101199980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 38.

The square root of 101199980 is about 10059.8200779139. The cubic root of 101199980 is about 466.0081107714.

The spelling of 101199980 in words is "one hundred one million, one hundred ninety-nine thousand, nine hundred eighty".