231121222201 has 4 divisors (see below), whose sum is σ = 231171503332. Its totient is φ = 231070941072.

The previous prime is 231121222141. The next prime is 231121222219. The reversal of 231121222201 is 102222121132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5782081600 + 225339140601 = 76040^2 + 474699^2 .

It is a cyclic number.

It is not a de Polignac number, because 231121222201 - 2¹¹ = 231121220153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231121222231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25133670 + ... + 25142863.

It is an arithmetic number, because the mean of its divisors is an integer number (57792875833).

Almost surely, 2^231121222201 is an apocalyptic number.

It is an amenable number.

231121222201 is a deficient number, since it is larger than the sum of its proper divisors (50281131).

231121222201 is an equidigital number, since it uses as much as digits as its factorization.

231121222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50281130.

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

Adding to 231121222201 its reverse (102222121132), we get a palindrome (333343343333).

The spelling of 231121222201 in words is "two hundred thirty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".