100020220 has 24 divisors (see below), whose sum is σ = 212922864. Its totient is φ = 39459456.

The previous prime is 100020191. The next prime is 100020233. The reversal of 100020220 is 22020001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32794 + ... + 35713.

It is an arithmetic number, because the mean of its divisors is an integer number (8871786).

Almost surely, 2^100020220 is an apocalyptic number.

100020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020220 is an abundant number, since it is smaller than the sum of its proper divisors (112902644).

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

100020220 is a wasteful number, since it uses less digits than its factorization.

100020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68589 (or 68587 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 100020220 is about 10001.0109488991. The cubic root of 100020220 is about 464.1901655617.

Adding to 100020220 its reverse (22020001), we get a palindrome (122040221).

The spelling of 100020220 in words is "one hundred million, twenty thousand, two hundred twenty".