122213312242421 has 2 divisors, whose sum is σ = 122213312242422. Its totient is φ = 122213312242420.

The previous prime is 122213312242331. The next prime is 122213312242477. The reversal of 122213312242421 is 124242213312221.

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., 106806313461796 + 15406998780625 = 10334714^2 + 3925175^2 .

It is an emirp because it is prime and its reverse (124242213312221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122213312242421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122213312242481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61106656121210 + 61106656121211.

It is an arithmetic number, because the mean of its divisors is an integer number (61106656121211).

Almost surely, 2^{122213312242421} is an apocalyptic number.

It is an amenable number.

122213312242421 is a deficient number, since it is larger than the sum of its proper divisors (1).

122213312242421 is an equidigital number, since it uses as much as digits as its factorization.

122213312242421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 32.

Adding to 122213312242421 its reverse (124242213312221), we get a palindrome (246455525554642).

The spelling of 122213312242421 in words is "one hundred twenty-two trillion, two hundred thirteen billion, three hundred twelve million, two hundred forty-two thousand, four hundred twenty-one".