1201221202011 has 16 divisors (see below), whose sum is σ = 1656945776160. Its totient is φ = 773158346240.

The previous prime is 1201221202003. The next prime is 1201221202057. The reversal of 1201221202011 is 1102021221021.

It is a cyclic number.

It is not a de Polignac number, because 1201221202011 - 2³ = 1201221202003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201221202081) 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, 1302481 + ... + 2024573.

It is an arithmetic number, because the mean of its divisors is an integer number (103559111010).

Almost surely, 2^{1201221202011} is an apocalyptic number.

1201221202011 is a deficient number, since it is larger than the sum of its proper divisors (455724574149).

1201221202011 is a wasteful number, since it uses less digits than its factorization.

1201221202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741246.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 1201221202011 its reverse (1102021221021), we get a palindrome (2303242423032).

The spelling of 1201221202011 in words is "one trillion, two hundred one billion, two hundred twenty-one million, two hundred two thousand, eleven".