100202210021 has 4 divisors (see below), whose sum is σ = 104558827872. Its totient is φ = 95845592172.

The previous prime is 100202210011. The next prime is 100202210029. The reversal of 100202210021 is 120012202001.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120012202001 = 34757 ⋅3452893.

It is a cyclic number.

It is not a de Polignac number, because 100202210021 - 2²² = 100198015717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100202209984 and 100202210011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202210029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178308891 + ... + 2178308936.

It is an arithmetic number, because the mean of its divisors is an integer number (26139706968).

Almost surely, 2^100202210021 is an apocalyptic number.

It is an amenable number.

100202210021 is a deficient number, since it is larger than the sum of its proper divisors (4356617851).

100202210021 is an equidigital number, since it uses as much as digits as its factorization.

100202210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4356617850.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100202210021 its reverse (120012202001), we get a palindrome (220214412022).

The spelling of 100202210021 in words is "one hundred billion, two hundred two million, two hundred ten thousand, twenty-one".