122212102421 has 2 divisors, whose sum is σ = 122212102422. Its totient is φ = 122212102420.

The previous prime is 122212102399. The next prime is 122212102483. The reversal of 122212102421 is 124201212221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108314050321 + 13898052100 = 329111^2 + 117890^2 .

It is a cyclic number.

It is not a de Polignac number, because 122212102421 - 2²² = 122207908117 is a prime.

It is a super-2 number, since 2×122212102421² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122212102393 and 122212102402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122212132421) 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, 61106051210 + 61106051211.

It is an arithmetic number, because the mean of its divisors is an integer number (61106051211).

Almost surely, 2^122212102421 is an apocalyptic number.

It is an amenable number.

122212102421 is a deficient number, since it is larger than the sum of its proper divisors (1).

122212102421 is an equidigital number, since it uses as much as digits as its factorization.

122212102421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 122212102421 its reverse (124201212221), we get a palindrome (246413314642).

The spelling of 122212102421 in words is "one hundred twenty-two billion, two hundred twelve million, one hundred two thousand, four hundred twenty-one".