20121103113013 has 32 divisors (see below), whose sum is σ = 24659858497536. Its totient is φ = 16040535686208.

The previous prime is 20121103112947. The next prime is 20121103113037. The reversal of 20121103113013 is 31031130112102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121103113013 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 (20121103113053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8097120 + ... + 10286182.

It is an arithmetic number, because the mean of its divisors is an integer number (770620578048).

Almost surely, 2^{20121103113013} is an apocalyptic number.

20121103113013 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20121103113013 is a deficient number, since it is larger than the sum of its proper divisors (4538755384523).

20121103113013 is a wasteful number, since it uses less digits than its factorization.

20121103113013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190673.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 20121103113013 its reverse (31031130112102), we get a palindrome (51152233225115).

Subtracting 20121103113013 from its reverse (31031130112102), we obtain a square (10910026999089 = 3303033²).

The spelling of 20121103113013 in words is "twenty trillion, one hundred twenty-one billion, one hundred three million, one hundred thirteen thousand, thirteen".