21003312212311 has 12 divisors (see below), whose sum is σ = 24810798075480. Its totient is φ = 17625157099680.

The previous prime is 21003312212299. The next prime is 21003312212347. The reversal of 21003312212311 is 11321221330012.

It is not a de Polignac number, because 21003312212311 - 2⁹ = 21003312211799 is a prime.

It is a super-2 number, since 2×21003312212311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003312212381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5649086956 + ... + 5649090673.

It is an arithmetic number, because the mean of its divisors is an integer number (2067566506290).

Almost surely, 2^{21003312212311} is an apocalyptic number.

21003312212311 is a deficient number, since it is larger than the sum of its proper divisors (3807485863169).

21003312212311 is a wasteful number, since it uses less digits than its factorization.

21003312212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11298177666 (or 11298177653 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21003312212311 its reverse (11321221330012), we get a palindrome (32324533542323).

The spelling of 21003312212311 in words is "twenty-one trillion, three billion, three hundred twelve million, two hundred twelve thousand, three hundred eleven".