21111311332 has 12 divisors (see below), whose sum is σ = 37271740716. Its totient is φ = 10462242560.

The previous prime is 21111311329. The next prime is 21111311341. The reversal of 21111311332 is 23311311112.

It can be written as a sum of positive squares in 2 ways, for example, as 3362144256 + 17749167076 = 57984^2 + 133226^2 .

It is a super-2 number, since 2×21111311332² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23352769 + ... + 23353672.

It is an arithmetic number, because the mean of its divisors is an integer number (3105978393).

Almost surely, 2^21111311332 is an apocalyptic number.

It is an amenable number.

21111311332 is a deficient number, since it is larger than the sum of its proper divisors (16160429384).

21111311332 is a wasteful number, since it uses less digits than its factorization.

21111311332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46706558 (or 46706556 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

Adding to 21111311332 its reverse (23311311112), we get a palindrome (44422622444).

The spelling of 21111311332 in words is "twenty-one billion, one hundred eleven million, three hundred eleven thousand, three hundred thirty-two".