21033110033123 has 8 divisors (see below), whose sum is σ = 22167895157520. Its totient is φ = 19901102842080.

The previous prime is 21033110033081. The next prime is 21033110033189. The reversal of 21033110033123 is 32133001133012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21033110033123 - 2²⁴ = 21033093255907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033110033623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694467788 + ... + 694498073.

It is an arithmetic number, because the mean of its divisors is an integer number (2770986894690).

Almost surely, 2^{21033110033123} is an apocalyptic number.

21033110033123 is a deficient number, since it is larger than the sum of its proper divisors (1134785124397).

21033110033123 is a wasteful number, since it uses less digits than its factorization.

21033110033123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388966677.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21033110033123 its reverse (32133001133012), we get a palindrome (53166111166135).

The spelling of 21033110033123 in words is "twenty-one trillion, thirty-three billion, one hundred ten million, thirty-three thousand, one hundred twenty-three".