1004120111 has 4 divisors (see below), whose sum is σ = 1005553224. Its totient is φ = 1002687000.

The previous prime is 1004120087. The next prime is 1004120119. The reversal of 1004120111 is 1110214001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1110214001 = 13 ⋅85401077.

It is a cyclic number.

It is not a de Polignac number, because 1004120111 - 2²⁶ = 937011247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1004120092 and 1004120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004120119) 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, 715505 + ... + 716906.

It is an arithmetic number, because the mean of its divisors is an integer number (251388306).

Almost surely, 2^1004120111 is an apocalyptic number.

1004120111 is a deficient number, since it is larger than the sum of its proper divisors (1433113).

1004120111 is an equidigital number, since it uses as much as digits as its factorization.

1004120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433112.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1004120111 is about 31687.8543136010. The cubic root of 1004120111 is about 1001.3714884927.

Adding to 1004120111 its reverse (1110214001), we get a palindrome (2114334112).

The spelling of 1004120111 in words is "one billion, four million, one hundred twenty thousand, one hundred eleven".