201231111230001 has 24 divisors (see below), whose sum is σ = 294804903670056. Its totient is φ = 132255747974400.

The previous prime is 201231111229999. The next prime is 201231111230027. The reversal of 201231111230001 is 100032111132102.

201231111230001 is a `hidden beast` number, since 20 + 1 + 231 + 1 + 112 + 300 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 67623057608976 + 133608053621025 = 8223324^2 + 11558895^2 .

It is not a de Polignac number, because 201231111230001 - 2¹ = 201231111229999 is a prime.

It is a super-2 number, since 2×201231111230001² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201231111630001) 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, 474844770 + ... + 475268363.

It is an arithmetic number, because the mean of its divisors is an integer number (12283537652919).

Almost surely, 2^{201231111230001} is an apocalyptic number.

It is an amenable number.

201231111230001 is a deficient number, since it is larger than the sum of its proper divisors (93573792440055).

201231111230001 is a wasteful number, since it uses less digits than its factorization.

201231111230001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950113473 (or 950113470 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 201231111230001 its reverse (100032111132102), we get a palindrome (301263222362103).

The spelling of 201231111230001 in words is "two hundred one trillion, two hundred thirty-one billion, one hundred eleven million, two hundred thirty thousand, one".