122020022221 has 4 divisors (see below), whose sum is σ = 122301824092. Its totient is φ = 121738220352.

The previous prime is 122020022207. The next prime is 122020022237. The reversal of 122020022221 is 122220020221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56323155625 + 65696866596 = 237325^2 + 256314^2 .

It is a cyclic number.

It is not a de Polignac number, because 122020022221 - 2⁷ = 122020022093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122020022195 and 122020022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122020025221) 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, 140900286 + ... + 140901151.

It is an arithmetic number, because the mean of its divisors is an integer number (30575456023).

Almost surely, 2^122020022221 is an apocalyptic number.

It is an amenable number.

122020022221 is a deficient number, since it is larger than the sum of its proper divisors (281801871).

122020022221 is an equidigital number, since it uses as much as digits as its factorization.

122020022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281801870.

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

Adding to 122020022221 its reverse (122220020221), we get a palindrome (244240042442).

It can be divided in two parts, 1220200 and 22221, that added together give a palindrome (1242421).

The spelling of 122020022221 in words is "one hundred twenty-two billion, twenty million, twenty-two thousand, two hundred twenty-one".