1243232111 has 16 divisors (see below), whose sum is σ = 1429194240. Its totient is φ = 1069557120.

The previous prime is 1243232093. The next prime is 1243232113. The reversal of 1243232111 is 1112323421.

It is not a de Polignac number, because 1243232111 - 2¹⁸ = 1242969967 is a prime.

It is a super-3 number, since 3×1243232111³ (a number of 28 digits) contains 333 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 (1243232113) 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, 227831 + ... + 233223.

It is an arithmetic number, because the mean of its divisors is an integer number (89324640).

Almost surely, 2^1243232111 is an apocalyptic number.

1243232111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1243232111 is a deficient number, since it is larger than the sum of its proper divisors (185962129).

1243232111 is a wasteful number, since it uses less digits than its factorization.

1243232111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526.

The product of its digits is 288, while the sum is 20.

The square root of 1243232111 is about 35259.4967491029. The cubic root of 1243232111 is about 1075.2696957368.

Adding to 1243232111 its reverse (1112323421), we get a palindrome (2355555532).

The spelling of 1243232111 in words is "one billion, two hundred forty-three million, two hundred thirty-two thousand, one hundred eleven".