21333311101 has 16 divisors (see below), whose sum is σ = 23273027568. Its totient is φ = 19475353600.

The previous prime is 21333311089. The next prime is 21333311107. The reversal of 21333311101 is 10111333312.

It can be written as a sum of positive squares in 8 ways, for example, as 248819076 + 21084492025 = 15774^2 + 145205^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333311101 - 2²⁷ = 21199093373 is a prime.

It is a super-2 number, since 2×21333311101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333311107) 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, 32121 + ... + 209041.

It is an arithmetic number, because the mean of its divisors is an integer number (1454564223).

Almost surely, 2^21333311101 is an apocalyptic number.

It is an amenable number.

21333311101 is a deficient number, since it is larger than the sum of its proper divisors (1939716467).

21333311101 is a wasteful number, since it uses less digits than its factorization.

21333311101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177152.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 21333311101 its reverse (10111333312), we get a palindrome (31444644413).

The spelling of 21333311101 in words is "twenty-one billion, three hundred thirty-three million, three hundred eleven thousand, one hundred one".