122221022011021 has 2 divisors, whose sum is σ = 122221022011022. Its totient is φ = 122221022011020.

The previous prime is 122221022010977. The next prime is 122221022011079. The reversal of 122221022011021 is 120110220122221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118558582948521 + 3662439062500 = 10888461^2 + 1913750^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122221022011021 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122221022011021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122221052011021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110511005510 + 61110511005511.

It is an arithmetic number, because the mean of its divisors is an integer number (61110511005511).

Almost surely, 2^{122221022011021} is an apocalyptic number.

It is an amenable number.

122221022011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122221022011021 is an equidigital number, since it uses as much as digits as its factorization.

122221022011021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 122221022011021 its reverse (120110220122221), we get a palindrome (242331242133242).

The spelling of 122221022011021 in words is "one hundred twenty-two trillion, two hundred twenty-one billion, twenty-two million, eleven thousand, twenty-one".