1220340643235 has 8 divisors (see below), whose sum is σ = 1673610025056. Its totient is φ = 836805012480.

The previous prime is 1220340643219. The next prime is 1220340643259. The reversal of 1220340643235 is 5323460430221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220340643235 - 2⁴ = 1220340643219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 34866875521 = 1220340643235 / (1 + 2 + 2 + 0 + 3 + 4 + 0 + 6 + 4 + 3 + 2 + 3 + 5).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220340643195 and 1220340643204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17433437726 + ... + 17433437795.

It is an arithmetic number, because the mean of its divisors is an integer number (209201253132).

Almost surely, 2^{1220340643235} is an apocalyptic number.

1220340643235 is a deficient number, since it is larger than the sum of its proper divisors (453269381821).

1220340643235 is an equidigital number, since it uses as much as digits as its factorization.

1220340643235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34866875533.

The product of its (nonzero) digits is 103680, while the sum is 35.

The spelling of 1220340643235 in words is "one trillion, two hundred twenty billion, three hundred forty million, six hundred forty-three thousand, two hundred thirty-five".