20121320123113 has 16 divisors (see below), whose sum is σ = 22263116629824. Its totient is φ = 18033088757760.

The previous prime is 20121320123089. The next prime is 20121320123143. The reversal of 20121320123113 is 31132102312102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121320123113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121320123143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36414195 + ... + 36962632.

It is an arithmetic number, because the mean of its divisors is an integer number (1391444789364).

Almost surely, 2^{20121320123113} is an apocalyptic number.

It is an amenable number.

20121320123113 is a deficient number, since it is larger than the sum of its proper divisors (2141796506711).

20121320123113 is a wasteful number, since it uses less digits than its factorization.

20121320123113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73377192.

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

Adding to 20121320123113 its reverse (31132102312102), we get a palindrome (51253422435215).

The spelling of 20121320123113 in words is "twenty trillion, one hundred twenty-one billion, three hundred twenty million, one hundred twenty-three thousand, one hundred thirteen".