21323111332 has 12 divisors (see below), whose sum is σ = 37442803356. Its totient is φ = 10625167520.

The previous prime is 21323111311. The next prime is 21323111357. The reversal of 21323111332 is 23311132312.

It can be written as a sum of positive squares in 2 ways, for example, as 9577753956 + 11745357376 = 97866^2 + 108376^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9095719 + ... + 9098062.

It is an arithmetic number, because the mean of its divisors is an integer number (3120233613).

Almost surely, 2^21323111332 is an apocalyptic number.

It is an amenable number.

21323111332 is a deficient number, since it is larger than the sum of its proper divisors (16119692024).

21323111332 is a wasteful number, since it uses less digits than its factorization.

21323111332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18194078 (or 18194076 counting only the distinct ones).

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

Adding to 21323111332 its reverse (23311132312), we get a palindrome (44634243644).

The spelling of 21323111332 in words is "twenty-one billion, three hundred twenty-three million, one hundred eleven thousand, three hundred thirty-two".