21013033611 has 16 divisors (see below), whose sum is σ = 29247736320. Its totient is φ = 13394018880.

The previous prime is 21013033609. The next prime is 21013033619. The reversal of 21013033611 is 11633031012.

It is not a de Polignac number, because 21013033611 - 2¹ = 21013033609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013033619) 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, 106050 + ... + 230808.

It is an arithmetic number, because the mean of its divisors is an integer number (1827983520).

Almost surely, 2^21013033611 is an apocalyptic number.

21013033611 is a deficient number, since it is larger than the sum of its proper divisors (8234702709).

21013033611 is a wasteful number, since it uses less digits than its factorization.

21013033611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127226.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21013033611 its reverse (11633031012), we get a palindrome (32646064623).

The spelling of 21013033611 in words is "twenty-one billion, thirteen million, thirty-three thousand, six hundred eleven".