1213241111 has 16 divisors (see below), whose sum is σ = 1241414400. Its totient is φ = 1185528960.

The previous prime is 1213241101. The next prime is 1213241119. The reversal of 1213241111 is 1111423121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213241111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213241111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213241119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3665216 + ... + 3665546.

It is an arithmetic number, because the mean of its divisors is an integer number (77588400).

Almost surely, 2^1213241111 is an apocalyptic number.

1213241111 is a deficient number, since it is larger than the sum of its proper divisors (28173289).

1213241111 is a wasteful number, since it uses less digits than its factorization.

1213241111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its digits is 48, while the sum is 17.

The square root of 1213241111 is about 34831.6108011100. The cubic root of 1213241111 is about 1066.5528307011.

Adding to 1213241111 its reverse (1111423121), we get a palindrome (2324664232).

The spelling of 1213241111 in words is "one billion, two hundred thirteen million, two hundred forty-one thousand, one hundred eleven".