21141001223 has 4 divisors (see below), whose sum is σ = 21141637680. Its totient is φ = 21140364768.

The previous prime is 21141001199. The next prime is 21141001229. The reversal of 21141001223 is 32210014112.

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 21141001223 - 2²⁴ = 21124224007 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 (21141001229) 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, 265490 + ... + 335807.

It is an arithmetic number, because the mean of its divisors is an integer number (5285409420).

Almost surely, 2^21141001223 is an apocalyptic number.

21141001223 is a deficient number, since it is larger than the sum of its proper divisors (636457).

21141001223 is an equidigital number, since it uses as much as digits as its factorization.

21141001223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636456.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21141001223 its reverse (32210014112), we get a palindrome (53351015335).

The spelling of 21141001223 in words is "twenty-one billion, one hundred forty-one million, one thousand, two hundred twenty-three".