1201101101111 has 4 divisors (see below), whose sum is σ = 1204188765000. Its totient is φ = 1198013437224.

The previous prime is 1201101101059. The next prime is 1201101101129. The reversal of 1201101101111 is 1111011011021.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201101101111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201101101092 and 1201101101101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201101101191) 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, 1543831361 + ... + 1543832138.

It is an arithmetic number, because the mean of its divisors is an integer number (301047191250).

Almost surely, 2^{1201101101111} is an apocalyptic number.

1201101101111 is a deficient number, since it is larger than the sum of its proper divisors (3087663889).

1201101101111 is an equidigital number, since it uses as much as digits as its factorization.

1201101101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087663888.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1201101101111 its reverse (1111011011021), we get a palindrome (2312112112132).

It can be divided in two parts, 120110 and 1101111, that added together give a palindrome (1221221).

The spelling of 1201101101111 in words is "one trillion, two hundred one billion, one hundred one million, one hundred one thousand, one hundred eleven".