1140021111 has 8 divisors (see below), whose sum is σ = 1520232064. Its totient is φ = 759912120.

The previous prime is 1140021089. The next prime is 1140021137. The reversal of 1140021111 is 1111200411.

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

It is not a de Polignac number, because 1140021111 - 2⁷ = 1140020983 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 (1140021011) 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, 6246 + ... + 48156.

It is an arithmetic number, because the mean of its divisors is an integer number (190029008).

Almost surely, 2^1140021111 is an apocalyptic number.

1140021111 is a deficient number, since it is larger than the sum of its proper divisors (380210953).

1140021111 is an equidigital number, since it uses as much as digits as its factorization.

1140021111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50981.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1140021111 is about 33764.1986577499. The cubic root of 1140021111 is about 1044.6503751679.

Adding to 1140021111 its reverse (1111200411), we get a palindrome (2251221522).

The spelling of 1140021111 in words is "one billion, one hundred forty million, twenty-one thousand, one hundred eleven".