102220100200021 has 4 divisors (see below), whose sum is σ = 102244868825472. Its totient is φ = 102195331574572.

The previous prime is 102220100200019. The next prime is 102220100200177. The reversal of 102220100200021 is 120002001022201.

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.

It is a cyclic number.

It is not a de Polignac number, because 102220100200021 - 2¹ = 102220100200019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102220100199974 and 102220100200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220100204021) 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, 12384306535 + ... + 12384314788.

It is an arithmetic number, because the mean of its divisors is an integer number (25561217206368).

Almost surely, 2^{102220100200021} is an apocalyptic number.

It is an amenable number.

102220100200021 is a deficient number, since it is larger than the sum of its proper divisors (24768625451).

102220100200021 is an equidigital number, since it uses as much as digits as its factorization.

102220100200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24768625450.

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

Adding to 102220100200021 its reverse (120002001022201), we get a palindrome (222222101222222).

The spelling of 102220100200021 in words is "one hundred two trillion, two hundred twenty billion, one hundred million, two hundred thousand, twenty-one".