221121202202201 has 16 divisors (see below), whose sum is σ = 256555501466880. Its totient is φ = 186669116274240.

The previous prime is 221121202202167. The next prime is 221121202202269. The reversal of 221121202202201 is 102202202121122.

It is a cyclic number.

It is not a de Polignac number, because 221121202202201 - 2¹⁰ = 221121202201177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221121202202291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867552170 + ... + 867807011.

It is an arithmetic number, because the mean of its divisors is an integer number (16034718841680).

Almost surely, 2^{221121202202201} is an apocalyptic number.

It is an amenable number.

221121202202201 is a deficient number, since it is larger than the sum of its proper divisors (35434299264679).

221121202202201 is a wasteful number, since it uses less digits than its factorization.

221121202202201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1735359464.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221121202202201 its reverse (102202202121122), we get a palindrome (323323404323323).

The spelling of 221121202202201 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, two hundred two million, two hundred two thousand, two hundred one".