122002142221 has 4 divisors (see below), whose sum is σ = 124069975200. Its totient is φ = 119934309244.

The previous prime is 122002142189. The next prime is 122002142231. The reversal of 122002142221 is 122241200221.

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: 122241200221 = 7 ⋅17463028603.

It is a cyclic number.

It is not a de Polignac number, because 122002142221 - 2⁵ = 122002142189 is a prime.

It is a super-2 number, since 2×122002142221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122002142231) 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, 1033916401 + ... + 1033916518.

It is an arithmetic number, because the mean of its divisors is an integer number (31017493800).

Almost surely, 2^122002142221 is an apocalyptic number.

It is an amenable number.

122002142221 is a deficient number, since it is larger than the sum of its proper divisors (2067832979).

122002142221 is an equidigital number, since it uses as much as digits as its factorization.

122002142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067832978.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 122002142221 its reverse (122241200221), we get a palindrome (244243342442).

The spelling of 122002142221 in words is "one hundred twenty-two billion, two million, one hundred forty-two thousand, two hundred twenty-one".