1201072111 has 4 divisors (see below), whose sum is σ = 1212297192. Its totient is φ = 1189847032.

The previous prime is 1201072079. The next prime is 1201072157. The reversal of 1201072111 is 1112701021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201072111 - 2⁵ = 1201072079 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 (1201072181) 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, 5612380 + ... + 5612593.

It is an arithmetic number, because the mean of its divisors is an integer number (303074298).

Almost surely, 2^1201072111 is an apocalyptic number.

1201072111 is a deficient number, since it is larger than the sum of its proper divisors (11225081).

1201072111 is a wasteful number, since it uses less digits than its factorization.

1201072111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11225080.

The product of its (nonzero) digits is 28, while the sum is 16.

The square root of 1201072111 is about 34656.4872859325. The cubic root of 1201072111 is about 1062.9749438548.

Adding to 1201072111 its reverse (1112701021), we get a palindrome (2313773132).

The spelling of 1201072111 in words is "one billion, two hundred one million, seventy-two thousand, one hundred eleven".