1220232621 has 8 divisors (see below), whose sum is σ = 1657674720. Its totient is φ = 798139472.

The previous prime is 1220232617. The next prime is 1220232641. The reversal of 1220232621 is 1262320221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220232621 - 2² = 1220232617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220232641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3837051 + ... + 3837368.

It is an arithmetic number, because the mean of its divisors is an integer number (207209340).

Almost surely, 2^1220232621 is an apocalyptic number.

It is an amenable number.

1220232621 is a deficient number, since it is larger than the sum of its proper divisors (437442099).

1220232621 is an equidigital number, since it uses as much as digits as its factorization.

1220232621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674475.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1220232621 is about 34931.8281943559. The cubic root of 1220232621 is about 1068.5976390718.

Adding to 1220232621 its reverse (1262320221), we get a palindrome (2482552842).

The spelling of 1220232621 in words is "one billion, two hundred twenty million, two hundred thirty-two thousand, six hundred twenty-one".