21012020313233 has 16 divisors (see below), whose sum is σ = 21257921131776. Its totient is φ = 20767087218960.

The previous prime is 21012020313209. The next prime is 21012020313241. The reversal of 21012020313233 is 33231302021012.

It is not a de Polignac number, because 21012020313233 - 2²⁶ = 21011953204369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21012020313199 and 21012020313208.

It is not an unprimeable number, because it can be changed into a prime (21012020313253) 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, 88703810 + ... + 88940372.

It is an arithmetic number, because the mean of its divisors is an integer number (1328620070736).

Almost surely, 2^{21012020313233} is an apocalyptic number.

It is an amenable number.

21012020313233 is a deficient number, since it is larger than the sum of its proper divisors (245900818543).

21012020313233 is a wasteful number, since it uses less digits than its factorization.

21012020313233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238604.

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

Adding to 21012020313233 its reverse (33231302021012), we get a palindrome (54243322334245).

The spelling of 21012020313233 in words is "twenty-one trillion, twelve billion, twenty million, three hundred thirteen thousand, two hundred thirty-three".