21111323332 has 24 divisors (see below), whose sum is σ = 40470689952. Its totient is φ = 9556233600.

The previous prime is 21111323267. The next prime is 21111323341. The reversal of 21111323332 is 23332311112.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 7 ways as a sum of consecutive naturals, for example, 984838 + ... + 1006045.

It is an arithmetic number, because the mean of its divisors is an integer number (1686278748).

Almost surely, 2^21111323332 is an apocalyptic number.

21111323332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21111323332 is a deficient number, since it is larger than the sum of its proper divisors (19359366620).

21111323332 is a wasteful number, since it uses less digits than its factorization.

21111323332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991139 (or 1991137 counting only the distinct ones).

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

Adding to 21111323332 its reverse (23332311112), we get a palindrome (44443634444).

It can be divided in two parts, 21111 and 323332, that added together give a palindrome (344443).

The spelling of 21111323332 in words is "twenty-one billion, one hundred eleven million, three hundred twenty-three thousand, three hundred thirty-two".