1200401111 has 16 divisors (see below), whose sum is σ = 1478281728. Its totient is φ = 949212000.

The previous prime is 1200401099. The next prime is 1200401113. The reversal of 1200401111 is 1111040021.

It is a cyclic number.

It is not a de Polignac number, because 1200401111 - 2¹⁸ = 1200138967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1200401092 and 1200401101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200401113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229556 + ... + 234726.

It is an arithmetic number, because the mean of its divisors is an integer number (92392608).

Almost surely, 2^1200401111 is an apocalyptic number.

1200401111 is a deficient number, since it is larger than the sum of its proper divisors (277880617).

1200401111 is a wasteful number, since it uses less digits than its factorization.

1200401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1200401111 is about 34646.8052062524. The cubic root of 1200401111 is about 1062.7769571154.

Adding to 1200401111 its reverse (1111040021), we get a palindrome (2311441132).

The spelling of 1200401111 in words is "one billion, two hundred million, four hundred one thousand, one hundred eleven".