1220233201 has 4 divisors (see below), whose sum is σ = 1331163504. Its totient is φ = 1109302900.

The previous prime is 1220233187. The next prime is 1220233211. The reversal of 1220233201 is 1023320221.

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 1220233201 - 2⁷ = 1220233073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220233211) 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, 55465135 + ... + 55465156.

It is an arithmetic number, because the mean of its divisors is an integer number (332790876).

Almost surely, 2^1220233201 is an apocalyptic number.

1220233201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220233201 is a deficient number, since it is larger than the sum of its proper divisors (110930303).

1220233201 is a wasteful number, since it uses less digits than its factorization.

1220233201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110930302.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1220233201 is about 34931.8364962394. The cubic root of 1220233201 is about 1068.5978083801.

Adding to 1220233201 its reverse (1023320221), we get a palindrome (2243553422).

The spelling of 1220233201 in words is "one billion, two hundred twenty million, two hundred thirty-three thousand, two hundred one".