21102112033 has 4 divisors (see below), whose sum is σ = 21104097280. Its totient is φ = 21100126788.

The previous prime is 21102112007. The next prime is 21102112039. The reversal of 21102112033 is 33021120112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21102112033 - 2⁵ = 21102112001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102111998 and 21102112016.

It is not an unprimeable number, because it can be changed into a prime (21102112039) 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, 976593 + ... + 997966.

It is an arithmetic number, because the mean of its divisors is an integer number (5276024320).

Almost surely, 2^21102112033 is an apocalyptic number.

It is an amenable number.

21102112033 is a deficient number, since it is larger than the sum of its proper divisors (1985247).

21102112033 is a wasteful number, since it uses less digits than its factorization.

21102112033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985246.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21102112033 its reverse (33021120112), we get a palindrome (54123232145).

The spelling of 21102112033 in words is "twenty-one billion, one hundred two million, one hundred twelve thousand, thirty-three".