21011320103012 has 48 divisors (see below), whose sum is σ = 38048186695680. Its totient is φ = 10142062250400.

The previous prime is 21011320102967. The next prime is 21011320103041. The reversal of 21011320103012 is 21030102311012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 692993189 + ... + 693023507.

It is an arithmetic number, because the mean of its divisors is an integer number (792670556160).

Almost surely, 2^{21011320103012} is an apocalyptic number.

It is an amenable number.

21011320103012 is a deficient number, since it is larger than the sum of its proper divisors (17036866592668).

21011320103012 is a wasteful number, since it uses less digits than its factorization.

21011320103012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43752 (or 43750 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21011320103012 its reverse (21030102311012), we get a palindrome (42041422414024).

The spelling of 21011320103012 in words is "twenty-one trillion, eleven billion, three hundred twenty million, one hundred three thousand, twelve".