102221110121 has 4 divisors (see below), whose sum is σ = 110084272452. Its totient is φ = 94357947792.

The previous prime is 102221110081. The next prime is 102221110127. The reversal of 102221110121 is 121011122201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121011122201 = 439 ⋅275651759.

It can be written as a sum of positive squares in 2 ways, for example, as 4979419225 + 97241690896 = 70565^2 + 311836^2 .

It is a cyclic number.

It is not a de Polignac number, because 102221110121 - 2²² = 102216915817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102221110096 and 102221110105.

It is not an unprimeable number, because it can be changed into a prime (102221110127) 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, 3931581146 + ... + 3931581171.

It is an arithmetic number, because the mean of its divisors is an integer number (27521068113).

Almost surely, 2^102221110121 is an apocalyptic number.

It is an amenable number.

102221110121 is a deficient number, since it is larger than the sum of its proper divisors (7863162331).

102221110121 is an equidigital number, since it uses as much as digits as its factorization.

102221110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863162330.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102221110121 its reverse (121011122201), we get a palindrome (223232232322).

The spelling of 102221110121 in words is "one hundred two billion, two hundred twenty-one million, one hundred ten thousand, one hundred twenty-one".