2011111201 has 4 divisors (see below), whose sum is σ = 2193939504. Its totient is φ = 1828282900.

The previous prime is 2011111181. The next prime is 2011111231. The reversal of 2011111201 is 1021111102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2011111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011111231) 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, 91414135 + ... + 91414156.

It is an arithmetic number, because the mean of its divisors is an integer number (548484876).

Almost surely, 2^2011111201 is an apocalyptic number.

It is an amenable number.

2011111201 is a deficient number, since it is larger than the sum of its proper divisors (182828303).

2011111201 is a wasteful number, since it uses less digits than its factorization.

2011111201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182828302.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2011111201 is about 44845.4144924540. The cubic root of 2011111201 is about 1262.2499483997.

Adding to 2011111201 its reverse (1021111102), we get a palindrome (3032222303).

Subtracting from 2011111201 its reverse (1021111102), we obtain a palindrome (990000099).

The spelling of 2011111201 in words is "two billion, eleven million, one hundred eleven thousand, two hundred one".