21011111110982 has 8 divisors (see below), whose sum is σ = 31591528108752. Its totient is φ = 10480601741400.

The previous prime is 21011111110973. The next prime is 21011111110993. The reversal of 21011111110982 is 28901111111012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×21011111110982³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12476905994 + ... + 12476907677.

It is an arithmetic number, because the mean of its divisors is an integer number (3948941013594).

Almost surely, 2^{21011111110982} is an apocalyptic number.

21011111110982 is a deficient number, since it is larger than the sum of its proper divisors (10580416997770).

21011111110982 is a wasteful number, since it uses less digits than its factorization.

21011111110982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24953814094.

The product of its (nonzero) digits is 288, while the sum is 29.

Adding to 21011111110982 its reverse (28901111111012), we get a palindrome (49912222221994).

The spelling of 21011111110982 in words is "twenty-one trillion, eleven billion, one hundred eleven million, one hundred ten thousand, nine hundred eighty-two".