201066111231 has 4 divisors (see below), whose sum is σ = 268088148312. Its totient is φ = 134044074152.

The previous prime is 201066111229. The next prime is 201066111247. The reversal of 201066111231 is 132111660102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201066111231 - 2¹ = 201066111229 is a prime.

It is a super-2 number, since 2×201066111231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201066111431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33511018536 + ... + 33511018541.

It is an arithmetic number, because the mean of its divisors is an integer number (67022037078).

Almost surely, 2^201066111231 is an apocalyptic number.

201066111231 is a deficient number, since it is larger than the sum of its proper divisors (67022037081).

201066111231 is an equidigital number, since it uses as much as digits as its factorization.

201066111231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67022037080.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 201066111231 its reverse (132111660102), we get a palindrome (333177771333).

The spelling of 201066111231 in words is "two hundred one billion, sixty-six million, one hundred eleven thousand, two hundred thirty-one".