21131333013023 has 4 divisors (see below), whose sum is σ = 21141202857768. Its totient is φ = 21121463168280.

The previous prime is 21131333013001. The next prime is 21131333013059. The reversal of 21131333013023 is 32031033313112.

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 21131333013023 - 2¹² = 21131333008927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131333012983 and 21131333013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131333013523) 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, 4934919161 + ... + 4934923442.

It is an arithmetic number, because the mean of its divisors is an integer number (5285300714442).

Almost surely, 2^{21131333013023} is an apocalyptic number.

21131333013023 is a deficient number, since it is larger than the sum of its proper divisors (9869844745).

21131333013023 is an equidigital number, since it uses as much as digits as its factorization.

21131333013023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9869844744.

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

Adding to 21131333013023 its reverse (32031033313112), we get a palindrome (53162366326135).

The spelling of 21131333013023 in words is "twenty-one trillion, one hundred thirty-one billion, three hundred thirty-three million, thirteen thousand, twenty-three".