201310121223 has 12 divisors (see below), whose sum is σ = 290789874648. Its totient is φ = 134202783600.

The previous prime is 201310121209. The next prime is 201310121231. The reversal of 201310121223 is 322121013102.

It is not a de Polignac number, because 201310121223 - 2²⁰ = 201309072647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201310121196 and 201310121205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201310121123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9748 + ... + 634598.

It is an arithmetic number, because the mean of its divisors is an integer number (24232489554).

Almost surely, 2^201310121223 is an apocalyptic number.

201310121223 is a deficient number, since it is larger than the sum of its proper divisors (89479753425).

201310121223 is a wasteful number, since it uses less digits than its factorization.

201310121223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660654 (or 660651 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201310121223 its reverse (322121013102), we get a palindrome (523431134325).

The spelling of 201310121223 in words is "two hundred one billion, three hundred ten million, one hundred twenty-one thousand, two hundred twenty-three".