122020110220721 has 2 divisors, whose sum is σ = 122020110220722. Its totient is φ = 122020110220720.

The previous prime is 122020110220691. The next prime is 122020110220733. The reversal of 122020110220721 is 127022011020221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119425227394225 + 2594882826496 = 10928185^2 + 1610864^2 .

It is a cyclic number.

It is not a de Polignac number, because 122020110220721 - 2¹⁴ = 122020110204337 is a prime.

It is not a weakly prime, because it can be changed into another prime (122020110250721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61010055110360 + 61010055110361.

It is an arithmetic number, because the mean of its divisors is an integer number (61010055110361).

Almost surely, 2^{122020110220721} is an apocalyptic number.

It is an amenable number.

122020110220721 is a deficient number, since it is larger than the sum of its proper divisors (1).

122020110220721 is an equidigital number, since it uses as much as digits as its factorization.

122020110220721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 122020110220721 its reverse (127022011020221), we get a palindrome (249042121240942).

The spelling of 122020110220721 in words is "one hundred twenty-two trillion, twenty billion, one hundred ten million, two hundred twenty thousand, seven hundred twenty-one".