1213110231 has 16 divisors (see below), whose sum is σ = 1663982304. Its totient is φ = 785562624.

The previous prime is 1213110221. The next prime is 1213110247. The reversal of 1213110231 is 1320113121.

It is a happy number.

It is not a de Polignac number, because 1213110231 - 2¹³ = 1213102039 is a prime.

It is a super-2 number, since 2×1213110231² = 2943272865113746722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213110231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213110221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59631 + ... + 77343.

It is an arithmetic number, because the mean of its divisors is an integer number (103998894).

Almost surely, 2^1213110231 is an apocalyptic number.

1213110231 is a deficient number, since it is larger than the sum of its proper divisors (450872073).

1213110231 is a wasteful number, since it uses less digits than its factorization.

1213110231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18370.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1213110231 is about 34829.7319972463. The cubic root of 1213110231 is about 1066.5144773864.

Adding to 1213110231 its reverse (1320113121), we get a palindrome (2533223352).

The spelling of 1213110231 in words is "one billion, two hundred thirteen million, one hundred ten thousand, two hundred thirty-one".