21213131332 has 6 divisors (see below), whose sum is σ = 37122979838. Its totient is φ = 10606565664.

The previous prime is 21213131321. The next prime is 21213131347. The reversal of 21213131332 is 23313131212.

It can be written as a sum of positive squares in only one way, i.e., 17364914176 + 3848217156 = 131776^2 + 62034^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651641413 + ... + 2651641420.

Almost surely, 2^21213131332 is an apocalyptic number.

It is an amenable number.

21213131332 is a deficient number, since it is larger than the sum of its proper divisors (15909848506).

21213131332 is a wasteful number, since it uses less digits than its factorization.

21213131332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5303282837 (or 5303282835 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 21213131332 its reverse (23313131212), we get a palindrome (44526262544).

The spelling of 21213131332 in words is "twenty-one billion, two hundred thirteen million, one hundred thirty-one thousand, three hundred thirty-two".