21333020101 has 16 divisors (see below), whose sum is σ = 21843320688. Its totient is φ = 20828505600.

The previous prime is 21333020081. The next prime is 21333020117. The reversal of 21333020101 is 10102033312.

It can be written as a sum of positive squares in 8 ways, for example, as 16728100 + 21316292001 = 4090^2 + 146001^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333020101 - 2⁵ = 21333020069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333020131) 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, 4745811 + ... + 4750303.

It is an arithmetic number, because the mean of its divisors is an integer number (1365207543).

Almost surely, 2^21333020101 is an apocalyptic number.

It is an amenable number.

21333020101 is a deficient number, since it is larger than the sum of its proper divisors (510300587).

21333020101 is a wasteful number, since it uses less digits than its factorization.

21333020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112.

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

Adding to 21333020101 its reverse (10102033312), we get a palindrome (31435053413).

The spelling of 21333020101 in words is "twenty-one billion, three hundred thirty-three million, twenty thousand, one hundred one".