122002221121 has 4 divisors (see below), whose sum is σ = 133093332144. Its totient is φ = 110911110100.

The previous prime is 122002221109. The next prime is 122002221137. The reversal of 122002221121 is 121122200221.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121122200221 = 11 ⋅11011109111.

It is a cyclic number.

It is not a de Polignac number, because 122002221121 - 2⁹ = 122002220609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122002221095 and 122002221104.

It is not an unprimeable number, because it can be changed into a prime (122002021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5545555495 + ... + 5545555516.

It is an arithmetic number, because the mean of its divisors is an integer number (33273333036).

Almost surely, 2^122002221121 is an apocalyptic number.

122002221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122002221121 is a deficient number, since it is larger than the sum of its proper divisors (11091111023).

122002221121 is a wasteful number, since it uses less digits than its factorization.

122002221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11091111022.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122002221121 its reverse (121122200221), we get a palindrome (243124421342).

The spelling of 122002221121 in words is "one hundred twenty-two billion, two million, two hundred twenty-one thousand, one hundred twenty-one".