1201013111 has 4 divisors (see below), whose sum is σ = 1201379592. Its totient is φ = 1200646632.

The previous prime is 1201013101. The next prime is 1201013117. The reversal of 1201013111 is 1113101021.

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-1201013111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201013092 and 1201013101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201013117) 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, 178280 + ... + 184893.

It is an arithmetic number, because the mean of its divisors is an integer number (300344898).

Almost surely, 2^1201013111 is an apocalyptic number.

1201013111 is a deficient number, since it is larger than the sum of its proper divisors (366481).

1201013111 is an equidigital number, since it uses as much as digits as its factorization.

1201013111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366480.

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1201013111 is about 34655.6360639940. The cubic root of 1201013111 is about 1062.9575381420.

Adding to 1201013111 its reverse (1113101021), we get a palindrome (2314114132).

The spelling of 1201013111 in words is "one billion, two hundred one million, thirteen thousand, one hundred eleven".