122077120721 has 2 divisors, whose sum is σ = 122077120722. Its totient is φ = 122077120720.

The previous prime is 122077120681. The next prime is 122077120807. The reversal of 122077120721 is 127021770221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102312978496 + 19764142225 = 319864^2 + 140585^2 .

It is a cyclic number.

It is not a de Polignac number, because 122077120721 - 2⁶ = 122077120657 is a prime.

It is not a weakly prime, because it can be changed into another prime (122077120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61038560360 + 61038560361.

It is an arithmetic number, because the mean of its divisors is an integer number (61038560361).

Almost surely, 2^122077120721 is an apocalyptic number.

It is an amenable number.

122077120721 is a deficient number, since it is larger than the sum of its proper divisors (1).

122077120721 is an equidigital number, since it uses as much as digits as its factorization.

122077120721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5488, while the sum is 32.

Adding to 122077120721 its reverse (127021770221), we get a palindrome (249098890942).

The spelling of 122077120721 in words is "one hundred twenty-two billion, seventy-seven million, one hundred twenty thousand, seven hundred twenty-one".