21141262343 has 4 divisors (see below), whose sum is σ = 21456803640. Its totient is φ = 20825721048.

The previous prime is 21141262327. The next prime is 21141262349. The reversal of 21141262343 is 34326214112.

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 21141262343 - 2⁴ = 21141262327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141262349) 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, 157770548 + ... + 157770681.

It is an arithmetic number, because the mean of its divisors is an integer number (5364200910).

Almost surely, 2^21141262343 is an apocalyptic number.

21141262343 is a deficient number, since it is larger than the sum of its proper divisors (315541297).

21141262343 is an equidigital number, since it uses as much as digits as its factorization.

21141262343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315541296.

The product of its digits is 6912, while the sum is 29.

Adding to 21141262343 its reverse (34326214112), we get a palindrome (55467476455).

The spelling of 21141262343 in words is "twenty-one billion, one hundred forty-one million, two hundred sixty-two thousand, three hundred forty-three".