2231343134221 has 4 divisors (see below), whose sum is σ = 2231347962492. Its totient is φ = 2231338305952.

The previous prime is 2231343134197. The next prime is 2231343134227. The reversal of 2231343134221 is 1224313431322.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2019454155625 + 211888978596 = 1421075^2 + 460314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2231343134221 - 2⁷ = 2231343134093 is a prime.

It is a super-3 number, since 3×2231343134221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231343134227) 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, 1637680 + ... + 2672953.

It is an arithmetic number, because the mean of its divisors is an integer number (557836990623).

Almost surely, 2^{2231343134221} is an apocalyptic number.

It is an amenable number.

2231343134221 is a deficient number, since it is larger than the sum of its proper divisors (4828271).

2231343134221 is an equidigital number, since it uses as much as digits as its factorization.

2231343134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4828270.

The product of its digits is 20736, while the sum is 31.

Adding to 2231343134221 its reverse (1224313431322), we get a palindrome (3455656565543).

The spelling of 2231343134221 in words is "two trillion, two hundred thirty-one billion, three hundred forty-three million, one hundred thirty-four thousand, two hundred twenty-one".