21142133323 has 4 divisors (see below), whose sum is σ = 21190293520. Its totient is φ = 21093973128.

The previous prime is 21142133303. The next prime is 21142133371. The reversal of 21142133323 is 32333124112.

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 21142133323 - 2²⁵ = 21108578891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142133303) 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, 24079440 + ... + 24080317.

It is an arithmetic number, because the mean of its divisors is an integer number (5297573380).

Almost surely, 2^21142133323 is an apocalyptic number.

21142133323 is a deficient number, since it is larger than the sum of its proper divisors (48160197).

21142133323 is an equidigital number, since it uses as much as digits as its factorization.

21142133323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48160196.

The product of its digits is 2592, while the sum is 25.

Adding to 21142133323 its reverse (32333124112), we get a palindrome (53475257435).

The spelling of 21142133323 in words is "twenty-one billion, one hundred forty-two million, one hundred thirty-three thousand, three hundred twenty-three".