1000120111 has 4 divisors (see below), whose sum is σ = 1002348000. Its totient is φ = 997892224.

The previous prime is 1000120103. The next prime is 1000120127. The reversal of 1000120111 is 1110210001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1110210001 = 1459 ⋅760939.

It is a cyclic number.

It is not a de Polignac number, because 1000120111 - 2³ = 1000120103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000120094 and 1000120103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000120181) 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, 1113271 + ... + 1114168.

It is an arithmetic number, because the mean of its divisors is an integer number (250587000).

Almost surely, 2^1000120111 is an apocalyptic number.

1000120111 is a deficient number, since it is larger than the sum of its proper divisors (2227889).

1000120111 is an equidigital number, since it uses as much as digits as its factorization.

1000120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227888.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 1000120111 is about 31624.6756663211. The cubic root of 1000120111 is about 1000.0400353971.

Adding to 1000120111 its reverse (1110210001), we get a palindrome (2110330112).

The spelling of 1000120111 in words is "one billion, one hundred twenty thousand, one hundred eleven".