102222123212221 has 4 divisors (see below), whose sum is σ = 102373116009372. Its totient is φ = 102071130415072.

The previous prime is 102222123212201. The next prime is 102222123212227. The reversal of 102222123212221 is 122212321222201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82561102106596 + 19661021105625 = 9086314^2 + 4434075^2 .

It is a cyclic number.

It is not a de Polignac number, because 102222123212221 - 2³⁷ = 102084684258749 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 (102222123212227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75496397560 + ... + 75496398913.

It is an arithmetic number, because the mean of its divisors is an integer number (25593279002343).

Almost surely, 2^{102222123212221} is an apocalyptic number.

It is an amenable number.

102222123212221 is a deficient number, since it is larger than the sum of its proper divisors (150992797151).

102222123212221 is an equidigital number, since it uses as much as digits as its factorization.

102222123212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150992797150.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 102222123212221 its reverse (122212321222201), we get a palindrome (224434444434422).

The spelling of 102222123212221 in words is "one hundred two trillion, two hundred twenty-two billion, one hundred twenty-three million, two hundred twelve thousand, two hundred twenty-one".