1201222111011 has 16 divisors (see below), whose sum is σ = 1815612368640. Its totient is φ = 700307627040.

The previous prime is 1201222111007. The next prime is 1201222111031. The reversal of 1201222111011 is 1101112221021.

It is a happy number.

It is not a de Polignac number, because 1201222111011 - 2² = 1201222111007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201222111031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 810540495 + ... + 810541976.

It is an arithmetic number, because the mean of its divisors is an integer number (113475773040).

Almost surely, 2^{1201222111011} is an apocalyptic number.

1201222111011 is a deficient number, since it is larger than the sum of its proper divisors (614390257629).

1201222111011 is a wasteful number, since it uses less digits than its factorization.

1201222111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621082506.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1201222111011 its reverse (1101112221021), we get a palindrome (2302334332032).

The spelling of 1201222111011 in words is "one trillion, two hundred one billion, two hundred twenty-two million, one hundred eleven thousand, eleven".