1200222220011 has 4 divisors (see below), whose sum is σ = 1600296293352. Its totient is φ = 800148146672.

The previous prime is 1200222220007. The next prime is 1200222220073. The reversal of 1200222220011 is 1100222220021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200222220011 - 2² = 1200222220007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200222222011) 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, 200037036666 + ... + 200037036671.

It is an arithmetic number, because the mean of its divisors is an integer number (400074073338).

Almost surely, 2^{1200222220011} is an apocalyptic number.

1200222220011 is a deficient number, since it is larger than the sum of its proper divisors (400074073341).

1200222220011 is an equidigital number, since it uses as much as digits as its factorization.

1200222220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400074073340.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1200222220011 its reverse (1100222220021), we get a palindrome (2300444440032).

The spelling of 1200222220011 in words is "one trillion, two hundred billion, two hundred twenty-two million, two hundred twenty thousand, eleven".