201231331002 has 48 divisors (see below), whose sum is σ = 475483357440. Its totient is φ = 61133563296.

The previous prime is 201231330991. The next prime is 201231331003. The reversal of 201231331002 is 200133132102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201231331003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5424318 + ... + 5461289.

It is an arithmetic number, because the mean of its divisors is an integer number (9905903280).

Almost surely, 2^201231331002 is an apocalyptic number.

201231331002 is an abundant number, since it is smaller than the sum of its proper divisors (274252026438).

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

201231331002 is a wasteful number, since it uses less digits than its factorization.

201231331002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885707 (or 10885704 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 201231331002 its reverse (200133132102), we get a palindrome (401364463104).

The spelling of 201231331002 in words is "two hundred one billion, two hundred thirty-one million, three hundred thirty-one thousand, two".