1220797169237 has 2 divisors, whose sum is σ = 1220797169238. Its totient is φ = 1220797169236.

The previous prime is 1220797169231. The next prime is 1220797169297. The reversal of 1220797169237 is 7329617970221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1130321943556 + 90475225681 = 1063166^2 + 300791^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220797169237 - 2⁶ = 1220797169173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220797169231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610398584618 + 610398584619.

It is an arithmetic number, because the mean of its divisors is an integer number (610398584619).

Almost surely, 2^{1220797169237} is an apocalyptic number.

It is an amenable number.

1220797169237 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220797169237 is an equidigital number, since it uses as much as digits as its factorization.

1220797169237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The spelling of 1220797169237 in words is "one trillion, two hundred twenty billion, seven hundred ninety-seven million, one hundred sixty-nine thousand, two hundred thirty-seven".