100920220 has 12 divisors (see below), whose sum is σ = 211932504. Its totient is φ = 40368080.

The previous prime is 100920217. The next prime is 100920227. The reversal of 100920220 is 22029001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100920194 and 100920203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100920227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2522986 + ... + 2523025.

It is an arithmetic number, because the mean of its divisors is an integer number (17661042).

Almost surely, 2^100920220 is an apocalyptic number.

100920220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100920220 is an abundant number, since it is smaller than the sum of its proper divisors (111012284).

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

100920220 is a wasteful number, since it uses less digits than its factorization.

100920220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5046020 (or 5046018 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 100920220 is about 10045.9056336400. The cubic root of 100920220 is about 465.5782992665.

Adding to 100920220 its reverse (22029001), we get a palindrome (122949221).

The spelling of 100920220 in words is "one hundred million, nine hundred twenty thousand, two hundred twenty".