201023112331 has 4 divisors (see below), whose sum is σ = 201032250664. Its totient is φ = 201013974000.

The previous prime is 201023112289. The next prime is 201023112341. The reversal of 201023112331 is 133211320102.

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 201023112331 - 2⁹ = 201023111819 is a prime.

It is a super-2 number, since 2×201023112331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201023112299 and 201023112308.

It is not an unprimeable number, because it can be changed into a prime (201023112341) 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, 4536090 + ... + 4580191.

It is an arithmetic number, because the mean of its divisors is an integer number (50258062666).

Almost surely, 2^201023112331 is an apocalyptic number.

201023112331 is a deficient number, since it is larger than the sum of its proper divisors (9138333).

201023112331 is an equidigital number, since it uses as much as digits as its factorization.

201023112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138332.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201023112331 its reverse (133211320102), we get a palindrome (334234432433).

The spelling of 201023112331 in words is "two hundred one billion, twenty-three million, one hundred twelve thousand, three hundred thirty-one".