1234312111 has 4 divisors (see below), whose sum is σ = 1244031232. Its totient is φ = 1224592992.

The previous prime is 1234312091. The next prime is 1234312127. The reversal of 1234312111 is 1112134321.

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 1234312111 - 2¹⁹ = 1233787823 is a prime.

It is a super-2 number, since 2×1234312111² = 3047052774722552642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1234312811) 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, 4859370 + ... + 4859623.

It is an arithmetic number, because the mean of its divisors is an integer number (311007808).

Almost surely, 2^1234312111 is an apocalyptic number.

1234312111 is a deficient number, since it is larger than the sum of its proper divisors (9719121).

1234312111 is an equidigital number, since it uses as much as digits as its factorization.

1234312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9719120.

The product of its digits is 144, while the sum is 19.

The square root of 1234312111 is about 35132.7782989049. The cubic root of 1234312111 is about 1072.6918889509.

Adding to 1234312111 its reverse (1112134321), we get a palindrome (2346446432).

The spelling of 1234312111 in words is "one billion, two hundred thirty-four million, three hundred twelve thousand, one hundred eleven".