100202020221 has 4 divisors (see below), whose sum is σ = 133602693632. Its totient is φ = 66801346812.

The previous prime is 100202020169. The next prime is 100202020297. The reversal of 100202020221 is 122020202001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 100202020221 - 2¹⁵ = 100201987453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100202020197 and 100202020206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202030221) 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, 16700336701 + ... + 16700336706.

It is an arithmetic number, because the mean of its divisors is an integer number (33400673408).

Almost surely, 2^100202020221 is an apocalyptic number.

It is an amenable number.

100202020221 is a deficient number, since it is larger than the sum of its proper divisors (33400673411).

100202020221 is an equidigital number, since it uses as much as digits as its factorization.

100202020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33400673410.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 100202020221 its reverse (122020202001), we get a palindrome (222222222222).

The spelling of 100202020221 in words is "one hundred billion, two hundred two million, twenty thousand, two hundred twenty-one".