2231121200221 has 8 divisors (see below), whose sum is σ = 2236149446400. Its totient is φ = 2226094923360.

The previous prime is 2231121200201. The next prime is 2231121200227. The reversal of 2231121200221 is 1220021211322.

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 2231121200221 - 2⁹ = 2231121199709 is a prime.

It is a super-3 number, since 3×2231121200221³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231121200227) 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, 1787985 + ... + 2767513.

It is an arithmetic number, because the mean of its divisors is an integer number (279518680800).

Almost surely, 2^{2231121200221} is an apocalyptic number.

It is an amenable number.

2231121200221 is a deficient number, since it is larger than the sum of its proper divisors (5028246179).

2231121200221 is an equidigital number, since it uses as much as digits as its factorization.

2231121200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984659.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2231121200221 its reverse (1220021211322), we get a palindrome (3451142411543).

It can be divided in two parts, 2231121 and 200221, that added together give a palindrome (2431342).

The spelling of 2231121200221 in words is "two trillion, two hundred thirty-one billion, one hundred twenty-one million, two hundred thousand, two hundred twenty-one".