21013320231033 has 32 divisors (see below), whose sum is σ = 32306818118400. Its totient is φ = 12033862342656.

The previous prime is 21013320230957. The next prime is 21013320231037. The reversal of 21013320231033 is 33013202331012.

It is not a de Polignac number, because 21013320231033 - 2¹³ = 21013320222841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21013320230994 and 21013320231012.

It is not an unprimeable number, because it can be changed into a prime (21013320231037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 177998853 + ... + 178116866.

It is an arithmetic number, because the mean of its divisors is an integer number (1009588066200).

Almost surely, 2^{21013320231033} is an apocalyptic number.

It is an amenable number.

21013320231033 is a deficient number, since it is larger than the sum of its proper divisors (11293497887367).

21013320231033 is a wasteful number, since it uses less digits than its factorization.

21013320231033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356115841.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21013320231033 its reverse (33013202331012), we get a palindrome (54026522562045).

The spelling of 21013320231033 in words is "twenty-one trillion, thirteen billion, three hundred twenty million, two hundred thirty-one thousand, thirty-three".