102222121210021 has 4 divisors (see below), whose sum is σ = 102222267253344. Its totient is φ = 102221975166700.

The previous prime is 102222121209997. The next prime is 102222121210043. The reversal of 102222121210021 is 120012121222201.

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 102222121210021 - 2⁷ = 102222121209893 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 (102222121210051) 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, 71966665 + ... + 73373326.

It is an arithmetic number, because the mean of its divisors is an integer number (25555566813336).

Almost surely, 2^{102222121210021} is an apocalyptic number.

It is an amenable number.

102222121210021 is a deficient number, since it is larger than the sum of its proper divisors (146043323).

102222121210021 is an equidigital number, since it uses as much as digits as its factorization.

102222121210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146043322.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 102222121210021 its reverse (120012121222201), we get a palindrome (222234242432222).

The spelling of 102222121210021 in words is "one hundred two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, twenty-one".