1220607980809 has 4 divisors (see below), whose sum is σ = 1394980549504. Its totient is φ = 1046235412116.

The previous prime is 1220607980789. The next prime is 1220607980831. The reversal of 1220607980809 is 9080897060221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220607980809 - 2⁹ = 1220607980297 is a prime.

It is a super-2 number, since 2×1220607980809² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220607980849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87186284337 + ... + 87186284350.

It is an arithmetic number, because the mean of its divisors is an integer number (348745137376).

Almost surely, 2^{1220607980809} is an apocalyptic number.

It is an amenable number.

1220607980809 is a deficient number, since it is larger than the sum of its proper divisors (174372568695).

1220607980809 is an equidigital number, since it uses as much as digits as its factorization.

1220607980809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174372568694.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 1220607980809 in words is "one trillion, two hundred twenty billion, six hundred seven million, nine hundred eighty thousand, eight hundred nine".