21023222331233 has 4 divisors (see below), whose sum is σ = 21748161032340. Its totient is φ = 20298283630128.

The previous prime is 21023222331149. The next prime is 21023222331239. The reversal of 21023222331233 is 33213322232012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5282697721744 + 15740524609489 = 2298412^2 + 3967433^2 .

It is not a de Polignac number, because 21023222331233 - 2⁸ = 21023222330977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 724938701077 = 21023222331233 / (2 + 1 + 0 + 2 + 3 + 2 + 2 + 2 + 3 + 3 + 1 + 2 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21023222331196 and 21023222331205.

It is not an unprimeable number, because it can be changed into a prime (21023222331239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362469350510 + ... + 362469350567.

It is an arithmetic number, because the mean of its divisors is an integer number (5437040258085).

Almost surely, 2^{21023222331233} is an apocalyptic number.

It is an amenable number.

21023222331233 is a deficient number, since it is larger than the sum of its proper divisors (724938701107).

21023222331233 is an equidigital number, since it uses as much as digits as its factorization.

21023222331233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724938701106.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 21023222331233 its reverse (33213322232012), we get a palindrome (54236544563245).

The spelling of 21023222331233 in words is "twenty-one trillion, twenty-three billion, two hundred twenty-two million, three hundred thirty-one thousand, two hundred thirty-three".