1231042111 has 8 divisors (see below), whose sum is σ = 1331581104. Its totient is φ = 1131337920.

The previous prime is 1231042103. The next prime is 1231042117. The reversal of 1231042111 is 1112401321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231042111 - 2³ = 1231042103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231042117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205630 + ... + 211531.

It is an arithmetic number, because the mean of its divisors is an integer number (166447638).

Almost surely, 2^1231042111 is an apocalyptic number.

1231042111 is a deficient number, since it is larger than the sum of its proper divisors (100538993).

1231042111 is a wasteful number, since it uses less digits than its factorization.

1231042111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417401.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 1231042111 is about 35086.2096983986. The cubic root of 1231042111 is about 1071.7437752593.

Adding to 1231042111 its reverse (1112401321), we get a palindrome (2343443432).

The spelling of 1231042111 in words is "one billion, two hundred thirty-one million, forty-two thousand, one hundred eleven".