21011312303111 has 8 divisors (see below), whose sum is σ = 23818491679920. Its totient is φ = 18374265009792.

The previous prime is 21011312303057. The next prime is 21011312303123. The reversal of 21011312303111 is 11130321311012.

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-21011312303111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011312303411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42533020610 + ... + 42533021103.

It is an arithmetic number, because the mean of its divisors is an integer number (2977311459990).

Almost surely, 2^{21011312303111} is an apocalyptic number.

21011312303111 is a deficient number, since it is larger than the sum of its proper divisors (2807179376809).

21011312303111 is a wasteful number, since it uses less digits than its factorization.

21011312303111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85066041745.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 21011312303111 its reverse (11130321311012), we get a palindrome (32141633614123).

The spelling of 21011312303111 in words is "twenty-one trillion, eleven billion, three hundred twelve million, three hundred three thousand, one hundred eleven".