21201311332 has 12 divisors (see below), whose sum is σ = 37109790396. Its totient is φ = 10598514080.

The previous prime is 21201311321. The next prime is 21201311333. The reversal of 21201311332 is 23311310212.

It can be written as a sum of positive squares in 2 ways, for example, as 6583050496 + 14618260836 = 81136^2 + 120906^2 .

It is a super-2 number, since 2×21201311332² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21201311333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513019 + ... + 552802.

It is an arithmetic number, because the mean of its divisors is an integer number (3092482533).

Almost surely, 2^21201311332 is an apocalyptic number.

It is an amenable number.

21201311332 is a deficient number, since it is larger than the sum of its proper divisors (15908479064).

21201311332 is a wasteful number, since it uses less digits than its factorization.

21201311332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070798 (or 1070796 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21201311332 its reverse (23311310212), we get a palindrome (44512621544).

The spelling of 21201311332 in words is "twenty-one billion, two hundred one million, three hundred eleven thousand, three hundred thirty-two".