101022990 has 16 divisors (see below), whose sum is σ = 242455248. Its totient is φ = 26939456.

The previous prime is 101022983. The next prime is 101022991. The reversal of 101022990 is 99220101.

It is a self number, because there is not a number n which added to its sum of digits gives 101022990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101022991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683687 + ... + 1683746.

It is an arithmetic number, because the mean of its divisors is an integer number (15153453).

Almost surely, 2^101022990 is an apocalyptic number.

101022990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101022990 is an abundant number, since it is smaller than the sum of its proper divisors (141432258).

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

101022990 is a wasteful number, since it uses less digits than its factorization.

101022990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3367443.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 101022990 is about 10051.0193512897. The cubic root of 101022990 is about 465.7362829672.

The spelling of 101022990 in words is "one hundred one million, twenty-two thousand, nine hundred ninety".