21031110332233 has 16 divisors (see below), whose sum is σ = 21737359752192. Its totient is φ = 20326605336000.

The previous prime is 21031110332191. The next prime is 21031110332237. The reversal of 21031110332233 is 33223301113012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031110332233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21031110332198 and 21031110332207.

It is not an unprimeable number, because it can be changed into a prime (21031110332237) 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 15 ways as a sum of consecutive naturals, for example, 274730943 + ... + 274807483.

It is an arithmetic number, because the mean of its divisors is an integer number (1358584984512).

Almost surely, 2^{21031110332233} is an apocalyptic number.

It is an amenable number.

21031110332233 is a deficient number, since it is larger than the sum of its proper divisors (706249419959).

21031110332233 is a wasteful number, since it uses less digits than its factorization.

21031110332233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87816.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21031110332233 its reverse (33223301113012), we get a palindrome (54254411445245).

The spelling of 21031110332233 in words is "twenty-one trillion, thirty-one billion, one hundred ten million, three hundred thirty-two thousand, two hundred thirty-three".