21023211112013 has 8 divisors (see below), whose sum is σ = 22934499952320. Its totient is φ = 19111936910080.

The previous prime is 21023211111971. The next prime is 21023211112019. The reversal of 21023211112013 is 31021111232012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023211112013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023211112019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541145 + ... + 6506862.

It is an arithmetic number, because the mean of its divisors is an integer number (2866812494040).

Almost surely, 2^{21023211112013} is an apocalyptic number.

It is an amenable number.

21023211112013 is a deficient number, since it is larger than the sum of its proper divisors (1911288840307).

21023211112013 is a wasteful number, since it uses less digits than its factorization.

21023211112013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7319187.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21023211112013 its reverse (31021111232012), we get a palindrome (52044322344025).

The spelling of 21023211112013 in words is "twenty-one trillion, twenty-three billion, two hundred eleven million, one hundred twelve thousand, thirteen".