122031200021 has 2 divisors, whose sum is σ = 122031200022. Its totient is φ = 122031200020.

The previous prime is 122031200009. The next prime is 122031200023. The reversal of 122031200021 is 120002130221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99014062225 + 23017137796 = 314665^2 + 151714^2 .

It is a cyclic number.

It is not a de Polignac number, because 122031200021 - 2¹⁰ = 122031198997 is a prime.

It is a super-2 number, since 2×122031200021² (a number of 23 digits) contains 22 as substring.

Together with 122031200023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122031199969 and 122031200005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122031200023) 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 as a sum of consecutive naturals, namely, 61015600010 + 61015600011.

It is an arithmetic number, because the mean of its divisors is an integer number (61015600011).

Almost surely, 2^122031200021 is an apocalyptic number.

It is an amenable number.

122031200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122031200021 is an equidigital number, since it uses as much as digits as its factorization.

122031200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 122031200021 its reverse (120002130221), we get a palindrome (242033330242).

The spelling of 122031200021 in words is "one hundred twenty-two billion, thirty-one million, two hundred thousand, twenty-one".