21113433331042 has 32 divisors (see below), whose sum is σ = 34940166945264. Its totient is φ = 9506445312000.

The previous prime is 21113433330989. The next prime is 21113433331043. The reversal of 21113433331042 is 24013333431112.

It can be written as a sum of positive squares in 8 ways, for example, as 10917347747881 + 10196085583161 = 3304141^2 + 3193131^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21113433330995 and 21113433331013.

It is not an unprimeable number, because it can be changed into a prime (21113433331043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18459042 + ... + 19569442.

Almost surely, 2^{21113433331042} is an apocalyptic number.

21113433331042 is a deficient number, since it is larger than the sum of its proper divisors (13826733614222).

21113433331042 is a wasteful number, since it uses less digits than its factorization.

21113433331042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128294.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 21113433331042 its reverse (24013333431112), we get a palindrome (45126766762154).

The spelling of 21113433331042 in words is "twenty-one trillion, one hundred thirteen billion, four hundred thirty-three million, three hundred thirty-one thousand, forty-two".