102222121 has 4 divisors (see below), whose sum is σ = 102736000. Its totient is φ = 101708244.

The previous prime is 102222089. The next prime is 102222149. The reversal of 102222121 is 121222201.

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 102222121 - 2⁵ = 102222089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102222191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256641 + ... + 257038.

It is an arithmetic number, because the mean of its divisors is an integer number (25684000).

Almost surely, 2^102222121 is an apocalyptic number.

It is an amenable number.

102222121 is a deficient number, since it is larger than the sum of its proper divisors (513879).

102222121 is an equidigital number, since it uses as much as digits as its factorization.

102222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513878.

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

The square root of 102222121 is about 10110.4955862707. The cubic root of 102222121 is about 467.5717845673.

Adding to 102222121 its reverse (121222201), we get a palindrome (223444322).

The spelling of 102222121 in words is "one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".