1140421111 has 16 divisors (see below), whose sum is σ = 1172876320. Its totient is φ = 1108546560.

The previous prime is 1140421069. The next prime is 1140421127. The reversal of 1140421111 is 1111240411.

It is a cyclic number.

It is not a de Polignac number, because 1140421111 - 2⁹ = 1140420599 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 (1140421171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2633551 + ... + 2633983.

It is an arithmetic number, because the mean of its divisors is an integer number (73304770).

Almost surely, 2^1140421111 is an apocalyptic number.

1140421111 is a deficient number, since it is larger than the sum of its proper divisors (32455209).

1140421111 is a wasteful number, since it uses less digits than its factorization.

1140421111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1140421111 is about 33770.1215721827. The cubic root of 1140421111 is about 1044.7725399488.

Adding to 1140421111 its reverse (1111240411), we get a palindrome (2251661522).

The spelling of 1140421111 in words is "one billion, one hundred forty million, four hundred twenty-one thousand, one hundred eleven".