21012033112013 has 8 divisors (see below), whose sum is σ = 21240692272128. Its totient is φ = 20784574263024.

The previous prime is 21012033112009. The next prime is 21012033112043. The reversal of 21012033112013 is 31021133021012.

It is a happy number.

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 21012033112013 - 2² = 21012033112009 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 (21012033112043) 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, 300042581 + ... + 300112602.

It is an arithmetic number, because the mean of its divisors is an integer number (2655086534016).

Almost surely, 2^{21012033112013} is an apocalyptic number.

It is an amenable number.

21012033112013 is a deficient number, since it is larger than the sum of its proper divisors (228659160115).

21012033112013 is a wasteful number, since it uses less digits than its factorization.

21012033112013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600155563.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21012033112013 its reverse (31021133021012), we get a palindrome (52033166133025).

The spelling of 21012033112013 in words is "twenty-one trillion, twelve billion, thirty-three million, one hundred twelve thousand, thirteen".