201231313320 has 64 divisors (see below), whose sum is σ = 604231917120. Its totient is φ = 53613863424.

The previous prime is 201231313319. The next prime is 201231313331. The reversal of 201231313320 is 23313132102.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611869 + ... + 881388.

It is an arithmetic number, because the mean of its divisors is an integer number (9441123705).

Almost surely, 2^201231313320 is an apocalyptic number.

201231313320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201231313320 is an abundant number, since it is smaller than the sum of its proper divisors (403000603800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201231313320 is a wasteful number, since it uses less digits than its factorization.

201231313320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494394 (or 1494390 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 201231313320 its reverse (23313132102), we get a palindrome (224544445422).

The spelling of 201231313320 in words is "two hundred one billion, two hundred thirty-one million, three hundred thirteen thousand, three hundred twenty".