201121221011223 has 16 divisors (see below), whose sum is σ = 275454545530880. Its totient is φ = 130435547511456.

The previous prime is 201121221011219. The next prime is 201121221011231. The reversal of 201121221011223 is 322110122121102.

It is not a de Polignac number, because 201121221011223 - 2² = 201121221011219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201121221011223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121221011723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148354915 + ... + 149704452.

It is an arithmetic number, because the mean of its divisors is an integer number (17215909095680).

Almost surely, 2^{201121221011223} is an apocalyptic number.

201121221011223 is a deficient number, since it is larger than the sum of its proper divisors (74333324519657).

201121221011223 is a wasteful number, since it uses less digits than its factorization.

201121221011223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298065486.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 201121221011223 its reverse (322110122121102), we get a palindrome (523231343132325).

The spelling of 201121221011223 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, two hundred twenty-three".