1040123311 has 4 divisors (see below), whose sum is σ = 1040199192. Its totient is φ = 1040047432.

The previous prime is 1040123263. The next prime is 1040123321. The reversal of 1040123311 is 1133210401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1040123311 - 2¹¹ = 1040121263 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 (1040123321) 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, 11005 + ... + 46918.

It is an arithmetic number, because the mean of its divisors is an integer number (260049798).

Almost surely, 2^1040123311 is an apocalyptic number.

1040123311 is a deficient number, since it is larger than the sum of its proper divisors (75881).

1040123311 is an equidigital number, since it uses as much as digits as its factorization.

1040123311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75880.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1040123311 is about 32250.9427924208. The cubic root of 1040123311 is about 1013.1994450900.

Adding to 1040123311 its reverse (1133210401), we get a palindrome (2173333712).

The spelling of 1040123311 in words is "one billion, forty million, one hundred twenty-three thousand, three hundred eleven".