221121110201 has 8 divisors (see below), whose sum is σ = 229526687880. Its totient is φ = 212767580032.

The previous prime is 221121110191. The next prime is 221121110219. The reversal of 221121110201 is 102011121122.

It can be written as a sum of positive squares in 4 ways, for example, as 91394359225 + 129726750976 = 302315^2 + 360176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221121110201 - 2¹⁰ = 221121109177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221121116201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13003220 + ... + 13020213.

It is an arithmetic number, because the mean of its divisors is an integer number (28690835985).

Almost surely, 2^221121110201 is an apocalyptic number.

It is an amenable number.

221121110201 is a deficient number, since it is larger than the sum of its proper divisors (8405577679).

221121110201 is a wasteful number, since it uses less digits than its factorization.

221121110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023755.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221121110201 its reverse (102011121122), we get a palindrome (323132231323).

The spelling of 221121110201 in words is "two hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, two hundred one".