122002022221 has 4 divisors (see below), whose sum is σ = 122132228092. Its totient is φ = 121871816352.

The previous prime is 122002022171. The next prime is 122002022243. The reversal of 122002022221 is 122220200221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122220200221 = 7 ⋅17460028603.

It can be written as a sum of positive squares in 2 ways, for example, as 2641446025 + 119360576196 = 51395^2 + 345486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122002022221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122002022195 and 122002022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122002022291) 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, 65101530 + ... + 65103403.

It is an arithmetic number, because the mean of its divisors is an integer number (30533057023).

Almost surely, 2^122002022221 is an apocalyptic number.

It is an amenable number.

122002022221 is a deficient number, since it is larger than the sum of its proper divisors (130205871).

122002022221 is an equidigital number, since it uses as much as digits as its factorization.

122002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130205870.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 122002022221 its reverse (122220200221), we get a palindrome (244222222442).

The spelling of 122002022221 in words is "one hundred twenty-two billion, two million, twenty-two thousand, two hundred twenty-one".