102222111212121 has 4 divisors (see below), whose sum is σ = 136296148282832. Its totient is φ = 68148074141412.

The previous prime is 102222111212101. The next prime is 102222111212129. The reversal of 102222111212121 is 121212111222201.

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 not a de Polignac number, because 102222111212121 - 2¹⁸ = 102222110949977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102222111212129) 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, 17037018535351 + ... + 17037018535356.

It is an arithmetic number, because the mean of its divisors is an integer number (34074037070708).

Almost surely, 2^{102222111212121} is an apocalyptic number.

It is an amenable number.

102222111212121 is a deficient number, since it is larger than the sum of its proper divisors (34074037070711).

102222111212121 is an equidigital number, since it uses as much as digits as its factorization.

102222111212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34074037070710.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 102222111212121 its reverse (121212111222201), we get a palindrome (223434222434322).

The spelling of 102222111212121 in words is "one hundred two trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty-one".