1200111005 has 16 divisors (see below), whose sum is σ = 1534961664. Its totient is φ = 897619200.

The previous prime is 1200110909. The next prime is 1200111007. The reversal of 1200111005 is 5001110021.

It is not a de Polignac number, because 1200111005 - 2²⁰ = 1199062429 is a prime.

It is a super-2 number, since 2×1200111005² = 2880532848644220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111007) 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, 33917 + ... + 59586.

It is an arithmetic number, because the mean of its divisors is an integer number (95935104).

Almost surely, 2^1200111005 is an apocalyptic number.

It is an amenable number.

1200111005 is a deficient number, since it is larger than the sum of its proper divisors (334850659).

1200111005 is a wasteful number, since it uses less digits than its factorization.

1200111005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93676.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1200111005 is about 34642.6183334921. The cubic root of 1200111005 is about 1062.6913349541.

Adding to 1200111005 its reverse (5001110021), we get a palindrome (6201221026).

The spelling of 1200111005 in words is "one billion, two hundred million, one hundred eleven thousand, five".