201312322231 has 4 divisors (see below), whose sum is σ = 201349477000. Its totient is φ = 201275167464.

The previous prime is 201312322229. The next prime is 201312322243. The reversal of 201312322231 is 132223213102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132223213102 = 2 ⋅66111606551.

It is a cyclic number.

It is not a de Polignac number, because 201312322231 - 2¹ = 201312322229 is a prime.

It is a super-2 number, since 2×201312322231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201312322261) 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, 18569256 + ... + 18580093.

It is an arithmetic number, because the mean of its divisors is an integer number (50337369250).

Almost surely, 2^201312322231 is an apocalyptic number.

201312322231 is a deficient number, since it is larger than the sum of its proper divisors (37154769).

201312322231 is an equidigital number, since it uses as much as digits as its factorization.

201312322231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37154768.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 201312322231 its reverse (132223213102), we get a palindrome (333535535333).

The spelling of 201312322231 in words is "two hundred one billion, three hundred twelve million, three hundred twenty-two thousand, two hundred thirty-one".