122621745709 has 2 divisors, whose sum is σ = 122621745710. Its totient is φ = 122621745708.

The previous prime is 122621745643. The next prime is 122621745793. The reversal of 122621745709 is 907547126221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109596088809 + 13025656900 = 331053^2 + 114130^2 .

It is a cyclic number.

It is not a de Polignac number, because 122621745709 - 2¹⁷ = 122621614637 is a prime.

It is a super-4 number, since 4×122621745709⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122621745409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61310872854 + 61310872855.

It is an arithmetic number, because the mean of its divisors is an integer number (61310872855).

Almost surely, 2^122621745709 is an apocalyptic number.

It is an amenable number.

122621745709 is a deficient number, since it is larger than the sum of its proper divisors (1).

122621745709 is an equidigital number, since it uses as much as digits as its factorization.

122621745709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 122621745709 in words is "one hundred twenty-two billion, six hundred twenty-one million, seven hundred forty-five thousand, seven hundred nine".