201322131023 has 4 divisors (see below), whose sum is σ = 216808448808. Its totient is φ = 185835813240.

The previous prime is 201322131011. The next prime is 201322131029. The reversal of 201322131023 is 320131223102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320131223102 = 2 ⋅160065611551.

It is a cyclic number.

It is not a de Polignac number, because 201322131023 - 2¹⁰ = 201322129999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201322130986 and 201322131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201322131029) 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, 7743158873 + ... + 7743158898.

It is an arithmetic number, because the mean of its divisors is an integer number (54202112202).

Almost surely, 2^201322131023 is an apocalyptic number.

201322131023 is a deficient number, since it is larger than the sum of its proper divisors (15486317785).

201322131023 is a wasteful number, since it uses less digits than its factorization.

201322131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15486317784.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 201322131023 its reverse (320131223102), we get a palindrome (521453354125).

The spelling of 201322131023 in words is "two hundred one billion, three hundred twenty-two million, one hundred thirty-one thousand, twenty-three".