2234131221 has 16 divisors (see below), whose sum is σ = 3426940928. Its totient is φ = 1268190000.

The previous prime is 2234131189. The next prime is 2234131223. The reversal of 2234131221 is 1221314322.

It is not a de Polignac number, because 2234131221 - 2⁵ = 2234131189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2234131223) 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, 349105 + ... + 355446.

It is an arithmetic number, because the mean of its divisors is an integer number (214183808).

Almost surely, 2^2234131221 is an apocalyptic number.

2234131221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2234131221 is a deficient number, since it is larger than the sum of its proper divisors (1192809707).

2234131221 is a wasteful number, since it uses less digits than its factorization.

2234131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704712.

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

The square root of 2234131221 is about 47266.5973071894. The cubic root of 2234131221 is about 1307.2828362672.

Adding to 2234131221 its reverse (1221314322), we get a palindrome (3455445543).

The spelling of 2234131221 in words is "two billion, two hundred thirty-four million, one hundred thirty-one thousand, two hundred twenty-one".