21232012341 has 4 divisors (see below), whose sum is σ = 28309349792. Its totient is φ = 14154674892.

The previous prime is 21232012337. The next prime is 21232012349. The reversal of 21232012341 is 14321023212.

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 21232012341 - 2² = 21232012337 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 (21232012349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538668721 + ... + 3538668726.

It is an arithmetic number, because the mean of its divisors is an integer number (7077337448).

Almost surely, 2^21232012341 is an apocalyptic number.

It is an amenable number.

21232012341 is a deficient number, since it is larger than the sum of its proper divisors (7077337451).

21232012341 is an equidigital number, since it uses as much as digits as its factorization.

21232012341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7077337450.

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

Adding to 21232012341 its reverse (14321023212), we get a palindrome (35553035553).

The spelling of 21232012341 in words is "twenty-one billion, two hundred thirty-two million, twelve thousand, three hundred forty-one".