21111303442 has 32 divisors (see below), whose sum is σ = 32353603200. Its totient is φ = 10329312000.

The previous prime is 21111303439. The next prime is 21111303487. The reversal of 21111303442 is 24430311112.

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 15 ways as a sum of consecutive naturals, for example, 13038909 + ... + 13040527.

It is an arithmetic number, because the mean of its divisors is an integer number (1011050100).

Almost surely, 2^21111303442 is an apocalyptic number.

21111303442 is a deficient number, since it is larger than the sum of its proper divisors (11242299758).

21111303442 is a wasteful number, since it uses less digits than its factorization.

21111303442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21111303442 its reverse (24430311112), we get a palindrome (45541614554).

The spelling of 21111303442 in words is "twenty-one billion, one hundred eleven million, three hundred three thousand, four hundred forty-two".