1220420422017 has 16 divisors (see below), whose sum is σ = 1886640266880. Its totient is φ = 778239109296.

The previous prime is 1220420422003. The next prime is 1220420422043. The reversal of 1220420422017 is 7102240240221.

It is a happy number.

1220420422017 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 420 + 4 + 220 + 17 = 666.

It is not a de Polignac number, because 1220420422017 - 2²⁷ = 1220286204289 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1220420522017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 982624518 + ... + 982625759.

It is an arithmetic number, because the mean of its divisors is an integer number (117915016680).

Almost surely, 2^{1220420422017} is an apocalyptic number.

It is an amenable number.

1220420422017 is a deficient number, since it is larger than the sum of its proper divisors (666219844863).

1220420422017 is a wasteful number, since it uses less digits than its factorization.

1220420422017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965250309 (or 1965250303 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

Adding to 1220420422017 its reverse (7102240240221), we get a palindrome (8322660662238).

The spelling of 1220420422017 in words is "one trillion, two hundred twenty billion, four hundred twenty million, four hundred twenty-two thousand, seventeen".