201313123 has 4 divisors (see below), whose sum is σ = 219614328. Its totient is φ = 183011920.

The previous prime is 201313109. The next prime is 201313129. The reversal of 201313123 is 321313102.

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

It is a cyclic number.

It is not a de Polignac number, because 201313123 - 2²¹ = 199215971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201313097 and 201313106.

It is not an unprimeable number, because it can be changed into a prime (201313129) 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, 9150586 + ... + 9150607.

It is an arithmetic number, because the mean of its divisors is an integer number (54903582).

Almost surely, 2^201313123 is an apocalyptic number.

201313123 is a deficient number, since it is larger than the sum of its proper divisors (18301205).

201313123 is a wasteful number, since it uses less digits than its factorization.

201313123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18301204.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 201313123 is about 14188.4855781017. The cubic root of 201313123 is about 586.0806217629.

Adding to 201313123 its reverse (321313102), we get a palindrome (522626225).

The spelling of 201313123 in words is "two hundred one million, three hundred thirteen thousand, one hundred twenty-three".