201310121020123 has 4 divisors (see below), whose sum is σ = 205108425190368. Its totient is φ = 197511816849880.

The previous prime is 201310121020093. The next prime is 201310121020139. The reversal of 201310121020123 is 321020121013102.

201310121020123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201310121020123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201310121020123.

It is not an unprimeable number, because it can be changed into a prime (201310121020423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1899152085043 + ... + 1899152085148.

It is an arithmetic number, because the mean of its divisors is an integer number (51277106297592).

Almost surely, 2^{201310121020123} is an apocalyptic number.

201310121020123 is a deficient number, since it is larger than the sum of its proper divisors (3798304170245).

201310121020123 is an equidigital number, since it uses as much as digits as its factorization.

201310121020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3798304170244.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201310121020123 its reverse (321020121013102), we get a palindrome (522330242033225).

The spelling of 201310121020123 in words is "two hundred one trillion, three hundred ten billion, one hundred twenty-one million, twenty thousand, one hundred twenty-three".