1220012201 has 4 divisors (see below), whose sum is σ = 1228091904. Its totient is φ = 1211932500.

The previous prime is 1220012197. The next prime is 1220012203. The reversal of 1220012201 is 1022100221.

It is a happy number.

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 1220012201 - 2² = 1220012197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220012203) 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, 4039625 + ... + 4039926.

It is an arithmetic number, because the mean of its divisors is an integer number (307022976).

Almost surely, 2^1220012201 is an apocalyptic number.

It is an amenable number.

1220012201 is a deficient number, since it is larger than the sum of its proper divisors (8079703).

1220012201 is an equidigital number, since it uses as much as digits as its factorization.

1220012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8079702.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1220012201 is about 34928.6730495162. The cubic root of 1220012201 is about 1068.5332921947.

Adding to 1220012201 its reverse (1022100221), we get a palindrome (2242112422).

The spelling of 1220012201 in words is "one billion, two hundred twenty million, twelve thousand, two hundred one".