21233100100033 has 4 divisors (see below), whose sum is σ = 21375604127700. Its totient is φ = 21090596072368.

The previous prime is 21233100099941. The next prime is 21233100100067. The reversal of 21233100100033 is 33000100133212.

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 6205444691329 + 15027655408704 = 2491073^2 + 3876552^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233100100033 - 2¹⁷ = 21233099968961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233100100133) 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, 71252013610 + ... + 71252013907.

It is an arithmetic number, because the mean of its divisors is an integer number (5343901031925).

Almost surely, 2^{21233100100033} is an apocalyptic number.

It is an amenable number.

21233100100033 is a deficient number, since it is larger than the sum of its proper divisors (142504027667).

21233100100033 is a wasteful number, since it uses less digits than its factorization.

21233100100033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142504027666.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21233100100033 its reverse (33000100133212), we get a palindrome (54233200233245).

The spelling of 21233100100033 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred million, one hundred thousand, thirty-three".