21031130323133 has 16 divisors (see below), whose sum is σ = 25614232473600. Its totient is φ = 16876043779056.

The previous prime is 21031130323117. The next prime is 21031130323139. The reversal of 21031130323133 is 33132303113012.

It is not a de Polignac number, because 21031130323133 - 2⁴ = 21031130323117 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 (21031130323139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1389653483 + ... + 1389668616.

It is an arithmetic number, because the mean of its divisors is an integer number (1600889529600).

Almost surely, 2^{21031130323133} is an apocalyptic number.

21031130323133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21031130323133 is a deficient number, since it is larger than the sum of its proper divisors (4583102150467).

21031130323133 is a wasteful number, since it uses less digits than its factorization.

21031130323133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2779322176.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21031130323133 its reverse (33132303113012), we get a palindrome (54163433436145).

The spelling of 21031130323133 in words is "twenty-one trillion, thirty-one billion, one hundred thirty million, three hundred twenty-three thousand, one hundred thirty-three".