2221242131 has 4 divisors (see below), whose sum is σ = 2249359200. Its totient is φ = 2193125064.

The previous prime is 2221242119. The next prime is 2221242161. The reversal of 2221242131 is 1312421222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2221242131 - 2¹⁰ = 2221241107 is a prime.

It is a super-2 number, since 2×2221242131² = 9867833209058842322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221242161) 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, 14058416 + ... + 14058573.

It is an arithmetic number, because the mean of its divisors is an integer number (562339800).

Almost surely, 2^2221242131 is an apocalyptic number.

2221242131 is a deficient number, since it is larger than the sum of its proper divisors (28117069).

2221242131 is an equidigital number, since it uses as much as digits as its factorization.

2221242131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28117068.

The product of its digits is 384, while the sum is 20.

The square root of 2221242131 is about 47130.0554954055. The cubic root of 2221242131 is about 1304.7640058081.

Adding to 2221242131 its reverse (1312421222), we get a palindrome (3533663353).

The spelling of 2221242131 in words is "two billion, two hundred twenty-one million, two hundred forty-two thousand, one hundred thirty-one".