21312233100033 has 16 divisors (see below), whose sum is σ = 28995487764480. Its totient is φ = 13919363587584.

The previous prime is 21312233099999. The next prime is 21312233100043. The reversal of 21312233100033 is 33000133221312.

It is not a de Polignac number, because 21312233100033 - 2²⁶ = 21312165991169 is a prime.

It is a super-2 number, since 2×21312233100033² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21312233099976 and 21312233100012.

It is not an unprimeable number, because it can be changed into a prime (21312233100043) 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, 99476353 + ... + 99690366.

It is an arithmetic number, because the mean of its divisors is an integer number (1812217985280).

Almost surely, 2^{21312233100033} is an apocalyptic number.

It is an amenable number.

21312233100033 is a deficient number, since it is larger than the sum of its proper divisors (7683254664447).

21312233100033 is a wasteful number, since it uses less digits than its factorization.

21312233100033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199167448.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21312233100033 its reverse (33000133221312), we get a palindrome (54312366321345).

The spelling of 21312233100033 in words is "twenty-one trillion, three hundred twelve billion, two hundred thirty-three million, one hundred thousand, thirty-three".