21011302033 has 16 divisors (see below), whose sum is σ = 22858070400. Its totient is φ = 19259944704.

The previous prime is 21011302027. The next prime is 21011302043. The reversal of 21011302033 is 33020311012.

It is a cyclic number.

It is not a de Polignac number, because 21011302033 - 2²⁹ = 20474431121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011301998 and 21011302016.

It is not an unprimeable number, because it can be changed into a prime (21011302043) 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, 148008 + ... + 252841.

It is an arithmetic number, because the mean of its divisors is an integer number (1428629400).

Almost surely, 2^21011302033 is an apocalyptic number.

21011302033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21011302033 is a deficient number, since it is larger than the sum of its proper divisors (1846768367).

21011302033 is a wasteful number, since it uses less digits than its factorization.

21011302033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400968.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21011302033 its reverse (33020311012), we get a palindrome (54031613045).

The spelling of 21011302033 in words is "twenty-one billion, eleven million, three hundred two thousand, thirty-three".