20121103331013 has 24 divisors (see below), whose sum is σ = 28567111900320. Its totient is φ = 12594874504960.

The previous prime is 20121103331011. The next prime is 20121103331033. The reversal of 20121103331013 is 31013330112102.

It is a happy number.

It is not a de Polignac number, because 20121103331013 - 2¹ = 20121103331011 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121103331011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27330918 + ... + 28057463.

It is an arithmetic number, because the mean of its divisors is an integer number (1190296329180).

Almost surely, 2^{20121103331013} is an apocalyptic number.

It is an amenable number.

20121103331013 is a deficient number, since it is larger than the sum of its proper divisors (8446008569307).

20121103331013 is a wasteful number, since it uses less digits than its factorization.

20121103331013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55388837 (or 55388820 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 20121103331013 its reverse (31013330112102), we get a palindrome (51134433443115).

The spelling of 20121103331013 in words is "twenty trillion, one hundred twenty-one billion, one hundred three million, three hundred thirty-one thousand, thirteen".