122122211021 has 2 divisors, whose sum is σ = 122122211022. Its totient is φ = 122122211020.

The previous prime is 122122211009. The next prime is 122122211039. The reversal of 122122211021 is 120112221221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107502015625 + 14620195396 = 327875^2 + 120914^2 .

It is a cyclic number.

It is not a de Polignac number, because 122122211021 - 2¹⁸ = 122121948877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122122211521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61061105510 + 61061105511.

It is an arithmetic number, because the mean of its divisors is an integer number (61061105511).

Almost surely, 2^122122211021 is an apocalyptic number.

It is an amenable number.

122122211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

122122211021 is an equidigital number, since it uses as much as digits as its factorization.

122122211021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122122211021 its reverse (120112221221), we get a palindrome (242234432242).

The spelling of 122122211021 in words is "one hundred twenty-two billion, one hundred twenty-two million, two hundred eleven thousand, twenty-one".