21231333101 has 16 divisors (see below), whose sum is σ = 23563968000. Its totient is φ = 18966398400.

The previous prime is 21231333083. The next prime is 21231333107. The reversal of 21231333101 is 10133313212.

It is a cyclic number.

It is not a de Polignac number, because 21231333101 - 2⁶ = 21231333037 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 (21231333107) 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, 702500 + ... + 732098.

It is an arithmetic number, because the mean of its divisors is an integer number (1472748000).

Almost surely, 2^21231333101 is an apocalyptic number.

It is an amenable number.

21231333101 is a deficient number, since it is larger than the sum of its proper divisors (2332634899).

21231333101 is a wasteful number, since it uses less digits than its factorization.

21231333101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30740.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21231333101 its reverse (10133313212), we get a palindrome (31364646313).

It can be divided in two parts, 212 and 31333101, that added together give a palindrome (31333313).

The spelling of 21231333101 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirty-three thousand, one hundred one".