1200222011 has 4 divisors (see below), whose sum is σ = 1205004024. Its totient is φ = 1195440000.

The previous prime is 1200221989. The next prime is 1200222013. The reversal of 1200222011 is 1102220021.

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-1200222011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200221983 and 1200222001.

It is not an unprimeable number, because it can be changed into a prime (1200222013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390630 + ... + 2391131.

It is an arithmetic number, because the mean of its divisors is an integer number (301251006).

Almost surely, 2^1200222011 is an apocalyptic number.

1200222011 is a deficient number, since it is larger than the sum of its proper divisors (4782013).

1200222011 is an equidigital number, since it uses as much as digits as its factorization.

1200222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4782012.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1200222011 is about 34644.2204559433. The cubic root of 1200222011 is about 1062.7240990004.

Adding to 1200222011 its reverse (1102220021), we get a palindrome (2302442032).

The spelling of 1200222011 in words is "one billion, two hundred million, two hundred twenty-two thousand, eleven".