122222121222221 has 2 divisors, whose sum is σ = 122222121222222. Its totient is φ = 122222121222220.

The previous prime is 122222121222181. The next prime is 122222121222301.

122222121222221 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121393811908996 + 828309313225 = 11017886^2 + 910115^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 122222121222221 - 2⁴² = 117824074711117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122222121222521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61111060611110 + 61111060611111.

It is an arithmetic number, because the mean of its divisors is an integer number (61111060611111).

Almost surely, 2^{122222121222221} is an apocalyptic number.

It is an amenable number.

122222121222221 is a deficient number, since it is larger than the sum of its proper divisors (1).

122222121222221 is an equidigital number, since it uses as much as digits as its factorization.

122222121222221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2048, while the sum is 26.

The spelling of 122222121222221 in words is "one hundred twenty-two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".