21231231110033 has 24 divisors (see below), whose sum is σ = 26287264917504. Its totient is φ = 17038041820800.

The previous prime is 21231231109937. The next prime is 21231231110041. The reversal of 21231231110033 is 33001113213212.

It is not a de Polignac number, because 21231231110033 - 2²⁴ = 21231214332817 is a prime.

It is a super-2 number, since 2×21231231110033² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231231109990 and 21231231110008.

It is not an unprimeable number, because it can be changed into a prime (21231231110093) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66562553 + ... + 66880758.

It is an arithmetic number, because the mean of its divisors is an integer number (1095302704896).

Almost surely, 2^{21231231110033} is an apocalyptic number.

It is an amenable number.

21231231110033 is a deficient number, since it is larger than the sum of its proper divisors (5056033807471).

21231231110033 is a wasteful number, since it uses less digits than its factorization.

21231231110033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133443533 (or 133443526 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21231231110033 its reverse (33001113213212), we get a palindrome (54232344323245).

The spelling of 21231231110033 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred thirty-one million, one hundred ten thousand, thirty-three".