102221102222021 has 4 divisors (see below), whose sum is σ = 102221288324832. Its totient is φ = 102220916119212.

The previous prime is 102221102221993. The next prime is 102221102222033. The reversal of 102221102222021 is 120222201122201.

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 102221102222021 - 2¹⁸ = 102221101959877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102221102221984 and 102221102222002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221102222821) 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, 92225051 + ... + 93326856.

It is an arithmetic number, because the mean of its divisors is an integer number (25555322081208).

Almost surely, 2^{102221102222021} is an apocalyptic number.

It is an amenable number.

102221102222021 is a deficient number, since it is larger than the sum of its proper divisors (186102811).

102221102222021 is an equidigital number, since it uses as much as digits as its factorization.

102221102222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186102810.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 102221102222021 its reverse (120222201122201), we get a palindrome (222443303344222).

The spelling of 102221102222021 in words is "one hundred two trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, twenty-one".