1220463568861 has 4 divisors (see below), whose sum is σ = 1227771734112. Its totient is φ = 1213155403612.

The previous prime is 1220463568837. The next prime is 1220463568873. The reversal of 1220463568861 is 1688653640221.

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 1220463568861 - 2¹⁵ = 1220463536093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220463568799 and 1220463568808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220463568661) 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, 3654082375 + ... + 3654082708.

It is an arithmetic number, because the mean of its divisors is an integer number (306942933528).

Almost surely, 2^{1220463568861} is an apocalyptic number.

It is an amenable number.

1220463568861 is a deficient number, since it is larger than the sum of its proper divisors (7308165251).

1220463568861 is an equidigital number, since it uses as much as digits as its factorization.

1220463568861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7308165250.

The product of its (nonzero) digits is 3317760, while the sum is 52.

The spelling of 1220463568861 in words is "one trillion, two hundred twenty billion, four hundred sixty-three million, five hundred sixty-eight thousand, eight hundred sixty-one".