1231105066 has 8 divisors (see below), whose sum is σ = 1850287140. Its totient is φ = 614342688.

The previous prime is 1231105063. The next prime is 1231105067. The reversal of 1231105066 is 6605011321.

It can be written as a sum of positive squares in 2 ways, for example, as 1219057225 + 12047841 = 34915^2 + 3471^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1231105066.

It is not an unprimeable number, because it can be changed into a prime (1231105063) 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, 603651 + ... + 605686.

Almost surely, 2^1231105066 is an apocalyptic number.

1231105066 is a deficient number, since it is larger than the sum of its proper divisors (619182074).

1231105066 is a wasteful number, since it uses less digits than its factorization.

1231105066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209848.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1231105066 is about 35087.1068342775. The cubic root of 1231105066 is about 1071.7620444636.

Adding to 1231105066 its reverse (6605011321), we get a palindrome (7836116387).

The spelling of 1231105066 in words is "one billion, two hundred thirty-one million, one hundred five thousand, sixty-six".