21013223013023 has 8 divisors (see below), whose sum is σ = 21030279225120. Its totient is φ = 20996168508160.

The previous prime is 21013223013011. The next prime is 21013223013067. The reversal of 21013223013023 is 32031032231012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21013223013023 - 2²² = 21013218818719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21013223013023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013223013623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24804011 + ... + 25637187.

It is an arithmetic number, because the mean of its divisors is an integer number (2628784903140).

Almost surely, 2^{21013223013023} is an apocalyptic number.

21013223013023 is a deficient number, since it is larger than the sum of its proper divisors (17056212097).

21013223013023 is a wasteful number, since it uses less digits than its factorization.

21013223013023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853617.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21013223013023 its reverse (32031032231012), we get a palindrome (53044255244035).

The spelling of 21013223013023 in words is "twenty-one trillion, thirteen billion, two hundred twenty-three million, thirteen thousand, twenty-three".