1200001220011 has 16 divisors (see below), whose sum is σ = 1343722193280. Its totient is φ = 1062397516480.

The previous prime is 1200001219933. The next prime is 1200001220023. The reversal of 1200001220011 is 1100221000021.

It is a cyclic number.

It is not a de Polignac number, because 1200001220011 - 2⁷ = 1200001219883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200001220011.

It is not an unprimeable number, because it can be changed into a prime (1200001220711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8570746 + ... + 8709631.

It is an arithmetic number, because the mean of its divisors is an integer number (83982637080).

Almost surely, 2^{1200001220011} is an apocalyptic number.

1200001220011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200001220011 is a deficient number, since it is larger than the sum of its proper divisors (143720973269).

1200001220011 is a wasteful number, since it uses less digits than its factorization.

1200001220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17280554.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1200001220011 its reverse (1100221000021), we get a palindrome (2300222220032).

The spelling of 1200001220011 in words is "one trillion, two hundred billion, one million, two hundred twenty thousand, eleven".