201231221323 has 8 divisors (see below), whose sum is σ = 219774156336. Its totient is φ = 182729817600.

The previous prime is 201231221311. The next prime is 201231221369. The reversal of 201231221323 is 323122132102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-201231221323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201231221294 and 201231221303.

It is not an unprimeable number, because it can be changed into a prime (201231224323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10372686 + ... + 10392067.

It is an arithmetic number, because the mean of its divisors is an integer number (27471769542).

Almost surely, 2^201231221323 is an apocalyptic number.

201231221323 is a deficient number, since it is larger than the sum of its proper divisors (18542935013).

201231221323 is a wasteful number, since it uses less digits than its factorization.

201231221323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20765645.

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

Adding to 201231221323 its reverse (323122132102), we get a palindrome (524353353425).

The spelling of 201231221323 in words is "two hundred one billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-three".