122122202021 has 4 divisors (see below), whose sum is σ = 123795108972. Its totient is φ = 120449295072.

The previous prime is 122122201979. The next prime is 122122202047. The reversal of 122122202021 is 120202221221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120202221221 = 4423 ⋅27176627.

It can be written as a sum of positive squares in 2 ways, for example, as 88974537796 + 33147664225 = 298286^2 + 182065^2 .

It is a cyclic number.

It is not a de Polignac number, because 122122202021 - 2¹⁴ = 122122185637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122202221) 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, 836453366 + ... + 836453511.

It is an arithmetic number, because the mean of its divisors is an integer number (30948777243).

Almost surely, 2^122122202021 is an apocalyptic number.

It is an amenable number.

122122202021 is a deficient number, since it is larger than the sum of its proper divisors (1672906951).

122122202021 is an equidigital number, since it uses as much as digits as its factorization.

122122202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672906950.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122122202021 its reverse (120202221221), we get a palindrome (242324423242).

The spelling of 122122202021 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred two thousand, twenty-one".