1200220117 has 4 divisors (see below), whose sum is σ = 1205908576. Its totient is φ = 1194531660.

The previous prime is 1200220081. The next prime is 1200220157. The reversal of 1200220117 is 7110220021.

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 1200220117 - 2⁷ = 1200219989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200220117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200220157) 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, 2843913 + ... + 2844334.

It is an arithmetic number, because the mean of its divisors is an integer number (301477144).

Almost surely, 2^1200220117 is an apocalyptic number.

It is an amenable number.

1200220117 is a deficient number, since it is larger than the sum of its proper divisors (5688459).

1200220117 is an equidigital number, since it uses as much as digits as its factorization.

1200220117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5688458.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 1200220117 is about 34644.1931209258. The cubic root of 1200220117 is about 1062.7235399925.

Adding to 1200220117 its reverse (7110220021), we get a palindrome (8310440138).

The spelling of 1200220117 in words is "one billion, two hundred million, two hundred twenty thousand, one hundred seventeen".