102220220012021 has 4 divisors (see below), whose sum is σ = 106664577403872. Its totient is φ = 97775862620172.

The previous prime is 102220220011997. The next prime is 102220220012123. The reversal of 102220220012021 is 120210022022201.

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 102220220012021 - 2⁴² = 97822173500917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220220014021) 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, 2222178695891 + ... + 2222178695936.

It is an arithmetic number, because the mean of its divisors is an integer number (26666144350968).

Almost surely, 2^{102220220012021} is an apocalyptic number.

It is an amenable number.

102220220012021 is a deficient number, since it is larger than the sum of its proper divisors (4444357391851).

102220220012021 is an equidigital number, since it uses as much as digits as its factorization.

102220220012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4444357391850.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 102220220012021 its reverse (120210022022201), we get a palindrome (222430242034222).

The spelling of 102220220012021 in words is "one hundred two trillion, two hundred twenty billion, two hundred twenty million, twelve thousand, twenty-one".