100202120200021 has 16 divisors (see below), whose sum is σ = 114688436284800. Its totient is φ = 85758791874048.

The previous prime is 100202120199991. The next prime is 100202120200027. The reversal of 100202120200021 is 120002021202001.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100202120200021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100202120199974 and 100202120200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202120200027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19210045 + ... + 23862733.

It is an arithmetic number, because the mean of its divisors is an integer number (7168027267800).

Almost surely, 2^{100202120200021} is an apocalyptic number.

It is an amenable number.

100202120200021 is a deficient number, since it is larger than the sum of its proper divisors (14486316084779).

100202120200021 is an equidigital number, since it uses as much as digits as its factorization.

100202120200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4657308.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100202120200021 its reverse (120002021202001), we get a palindrome (220204141402022).

The spelling of 100202120200021 in words is "one hundred trillion, two hundred two billion, one hundred twenty million, two hundred thousand, twenty-one".