2121200110221 has 8 divisors (see below), whose sum is σ = 2829159869184. Its totient is φ = 1413686879040.

The previous prime is 2121200110213. The next prime is 2121200110231. The reversal of 2121200110221 is 1220110021212.

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

It is not a de Polignac number, because 2121200110221 - 2³ = 2121200110213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121200110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121200110231) 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, 111620860 + ... + 111639861.

It is an arithmetic number, because the mean of its divisors is an integer number (353644983648).

Almost surely, 2^{2121200110221} is an apocalyptic number.

It is an amenable number.

2121200110221 is a deficient number, since it is larger than the sum of its proper divisors (707959758963).

2121200110221 is a wasteful number, since it uses less digits than its factorization.

2121200110221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223263891.

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

Adding to 2121200110221 its reverse (1220110021212), we get a palindrome (3341310131433).

The spelling of 2121200110221 in words is "two trillion, one hundred twenty-one billion, two hundred million, one hundred ten thousand, two hundred twenty-one".