21031013210111 has 8 divisors (see below), whose sum is σ = 21034309146240. Its totient is φ = 21027717499032.

The previous prime is 21031013210089. The next prime is 21031013210153. The reversal of 21031013210111 is 11101231013012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031013210111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21031013210111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031013200111) 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 7 ways as a sum of consecutive naturals, for example, 302992736 + ... + 303062138.

It is an arithmetic number, because the mean of its divisors is an integer number (2629288643280).

Almost surely, 2^{21031013210111} is an apocalyptic number.

21031013210111 is a deficient number, since it is larger than the sum of its proper divisors (3295936129).

21031013210111 is an equidigital number, since it uses as much as digits as its factorization.

21031013210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112525.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 21031013210111 its reverse (11101231013012), we get a palindrome (32132244223123).

The spelling of 21031013210111 in words is "twenty-one trillion, thirty-one billion, thirteen million, two hundred ten thousand, one hundred eleven".