102221202122021 has 4 divisors (see below), whose sum is σ = 102256414388832. Its totient is φ = 102185989855212.

The previous prime is 102221202121979. The next prime is 102221202122033. The reversal of 102221202122021 is 120221202122201.

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 102221202122021 - 2¹⁰ = 102221202120997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102221202121984 and 102221202122002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221202128021) 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, 17606129051 + ... + 17606134856.

It is an arithmetic number, because the mean of its divisors is an integer number (25564103597208).

Almost surely, 2^{102221202122021} is an apocalyptic number.

It is an amenable number.

102221202122021 is a deficient number, since it is larger than the sum of its proper divisors (35212266811).

102221202122021 is an equidigital number, since it uses as much as digits as its factorization.

102221202122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35212266810.

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

Adding to 102221202122021 its reverse (120221202122201), we get a palindrome (222442404244222).

The spelling of 102221202122021 in words is "one hundred two trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-two thousand, twenty-one".