21002320131233 has 16 divisors (see below), whose sum is σ = 24129231519744. Its totient is φ = 17907060852240.

The previous prime is 21002320131227. The next prime is 21002320131241. The reversal of 21002320131233 is 33213102320012.

It is not a de Polignac number, because 21002320131233 - 2¹² = 21002320127137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002320131199 and 21002320131208.

It is not an unprimeable number, because it can be changed into a prime (21002320131433) 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, 36841616 + ... + 37407342.

It is an arithmetic number, because the mean of its divisors is an integer number (1508076969984).

Almost surely, 2^{21002320131233} is an apocalyptic number.

It is an amenable number.

21002320131233 is a deficient number, since it is larger than the sum of its proper divisors (3126911388511).

21002320131233 is a wasteful number, since it uses less digits than its factorization.

21002320131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593692.

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

Adding to 21002320131233 its reverse (33213102320012), we get a palindrome (54215422451245).

The spelling of 21002320131233 in words is "twenty-one trillion, two billion, three hundred twenty million, one hundred thirty-one thousand, two hundred thirty-three".