1201111211 has 8 divisors (see below), whose sum is σ = 1219638480. Its totient is φ = 1182601728.

The previous prime is 1201111141. The next prime is 1201111243. The reversal of 1201111211 is 1121111021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1201111211 - 2³⁰ = 127369387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201111192 and 1201111201.

It is not an unprimeable number, because it can be changed into a prime (1201111271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209495 + ... + 215151.

It is an arithmetic number, because the mean of its divisors is an integer number (152454810).

Almost surely, 2^1201111211 is an apocalyptic number.

1201111211 is a deficient number, since it is larger than the sum of its proper divisors (18527269).

1201111211 is an equidigital number, since it uses as much as digits as its factorization.

1201111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8893.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1201111211 is about 34657.0513892916. The cubic root of 1201111211 is about 1062.9864785131.

Adding to 1201111211 its reverse (1121111021), we get a palindrome (2322222232).

The spelling of 1201111211 in words is "one billion, two hundred one million, one hundred eleven thousand, two hundred eleven".