102122221121221 has 4 divisors (see below), whose sum is σ = 116711109852832. Its totient is φ = 87533332389612.

The previous prime is 102122221121213. The next prime is 102122221121233. The reversal of 102122221121221 is 122121122221201.

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 102122221121221 - 2³ = 102122221121213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102122221121192 and 102122221121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102122221121021) 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, 7294444365795 + ... + 7294444365808.

It is an arithmetic number, because the mean of its divisors is an integer number (29177777463208).

Almost surely, 2^{102122221121221} is an apocalyptic number.

It is an amenable number.

102122221121221 is a deficient number, since it is larger than the sum of its proper divisors (14588888731611).

102122221121221 is an equidigital number, since it uses as much as digits as its factorization.

102122221121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14588888731610.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 102122221121221 its reverse (122121122221201), we get a palindrome (224243343342422).

The spelling of 102122221121221 in words is "one hundred two trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred twenty-one".