1201202201221 has 32 divisors (see below), whose sum is σ = 1438155896832. Its totient is φ = 990885308160.

The previous prime is 1201202201161. The next prime is 1201202201261. The reversal of 1201202201221 is 1221022021021.

It is a happy number.

It is not a de Polignac number, because 1201202201221 - 2¹¹ = 1201202199173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201202201195 and 1201202201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201202201261) 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 31 ways as a sum of consecutive naturals, for example, 431071 + ... + 1608796.

It is an arithmetic number, because the mean of its divisors is an integer number (44942371776).

Almost surely, 2^{1201202201221} is an apocalyptic number.

1201202201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1201202201221 is a deficient number, since it is larger than the sum of its proper divisors (236953695611).

1201202201221 is a wasteful number, since it uses less digits than its factorization.

1201202201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040009.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1201202201221 its reverse (1221022021021), we get a palindrome (2422224222242).

The spelling of 1201202201221 in words is "one trillion, two hundred one billion, two hundred two million, two hundred one thousand, two hundred twenty-one".