1220454201 has 4 divisors (see below), whose sum is σ = 1627272272. Its totient is φ = 813636132.

The previous prime is 1220454181. The next prime is 1220454211. The reversal of 1220454201 is 1024540221.

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 not a de Polignac number, because 1220454201 - 2⁷ = 1220454073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220454211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203409031 + ... + 203409036.

It is an arithmetic number, because the mean of its divisors is an integer number (406818068).

Almost surely, 2^1220454201 is an apocalyptic number.

It is an amenable number.

1220454201 is a deficient number, since it is larger than the sum of its proper divisors (406818071).

1220454201 is an equidigital number, since it uses as much as digits as its factorization.

1220454201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406818070.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 1220454201 is about 34934.9996565049. Note that the first 3 decimals coincide. The cubic root of 1220454201 is about 1068.6623167762.

Adding to 1220454201 its reverse (1024540221), we get a palindrome (2244994422).

The spelling of 1220454201 in words is "one billion, two hundred twenty million, four hundred fifty-four thousand, two hundred one".