21031233033233 has 16 divisors (see below), whose sum is σ = 21167723965824. Its totient is φ = 20895234846720.

The previous prime is 21031233033197. The next prime is 21031233033287. The reversal of 21031233033233 is 33233033213012.

It is a cyclic number.

It is not a de Polignac number, because 21031233033233 - 2²² = 21031228838929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21031233033196 and 21031233033205.

It is not an unprimeable number, because it can be changed into a prime (21031233933233) 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, 157741388 + ... + 157874658.

It is an arithmetic number, because the mean of its divisors is an integer number (1322982747864).

Almost surely, 2^{21031233033233} is an apocalyptic number.

It is an amenable number.

21031233033233 is a deficient number, since it is larger than the sum of its proper divisors (136490932591).

21031233033233 is a wasteful number, since it uses less digits than its factorization.

21031233033233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135112.

The product of its (nonzero) digits is 17496, while the sum is 29.

Adding to 21031233033233 its reverse (33233033213012), we get a palindrome (54264266246245).

The spelling of 21031233033233 in words is "twenty-one trillion, thirty-one billion, two hundred thirty-three million, thirty-three thousand, two hundred thirty-three".