201231323100 has 108 divisors (see below), whose sum is σ = 630955308984. Its totient is φ = 53644083840.

The previous prime is 201231323081. The next prime is 201231323141. The reversal of 201231323100 is 1323132102.

201231323100 is a `hidden beast` number, since 201 + 23 + 132 + 310 + 0 = 666.

It is a super-2 number, since 2×201231323100² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2833222 + ... + 2903378.

Almost surely, 2^201231323100 is an apocalyptic number.

201231323100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201231323100 is an abundant number, since it is smaller than the sum of its proper divisors (429723985884).

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

201231323100 is a wasteful number, since it uses less digits than its factorization.

201231323100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73364 (or 73354 counting only the distinct ones).

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

Adding to 201231323100 its reverse (1323132102), we get a palindrome (202554455202).

The spelling of 201231323100 in words is "two hundred one billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred".