101209900 has 36 divisors (see below), whose sum is σ = 239594040. Its totient is φ = 36803200.

The previous prime is 101209883. The next prime is 101209907. The reversal of 101209900 is 9902101.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101209907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44905 + ... + 47104.

It is an arithmetic number, because the mean of its divisors is an integer number (6655390).

Almost surely, 2^101209900 is an apocalyptic number.

101209900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101209900 is an abundant number, since it is smaller than the sum of its proper divisors (138384140).

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

101209900 is a wasteful number, since it uses less digits than its factorization.

101209900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92034 (or 92027 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 101209900 is about 10060.3131163995. The cubic root of 101209900 is about 466.0233368924.

The spelling of 101209900 in words is "one hundred one million, two hundred nine thousand, nine hundred".