1220243401 has 16 divisors (see below), whose sum is σ = 1334511360. Its totient is φ = 1108972800.

The previous prime is 1220243393. The next prime is 1220243443. The reversal of 1220243401 is 1043420221.

It is not a de Polignac number, because 1220243401 - 2³ = 1220243393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220243471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410346 + ... + 413308.

It is an arithmetic number, because the mean of its divisors is an integer number (83406960).

Almost surely, 2^1220243401 is an apocalyptic number.

It is an amenable number.

1220243401 is a deficient number, since it is larger than the sum of its proper divisors (114267959).

1220243401 is a wasteful number, since it uses less digits than its factorization.

1220243401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220243401 is about 34931.9824945565. The cubic root of 1220243401 is about 1068.6007858622.

Adding to 1220243401 its reverse (1043420221), we get a palindrome (2263663622).

The spelling of 1220243401 in words is "one billion, two hundred twenty million, two hundred forty-three thousand, four hundred one".