21220231341 has 4 divisors (see below), whose sum is σ = 28293641792. Its totient is φ = 14146820892.

The previous prime is 21220231309. The next prime is 21220231349. The reversal of 21220231341 is 14313202212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21220231341 - 2⁵ = 21220231309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220231349) 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, 3536705221 + ... + 3536705226.

It is an arithmetic number, because the mean of its divisors is an integer number (7073410448).

Almost surely, 2^21220231341 is an apocalyptic number.

It is an amenable number.

21220231341 is a deficient number, since it is larger than the sum of its proper divisors (7073410451).

21220231341 is an equidigital number, since it uses as much as digits as its factorization.

21220231341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7073410450.

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

Adding to 21220231341 its reverse (14313202212), we get a palindrome (35533433553).

The spelling of 21220231341 in words is "twenty-one billion, two hundred twenty million, two hundred thirty-one thousand, three hundred forty-one".