243121222201 has 32 divisors (see below), whose sum is σ = 294943380480. Its totient is φ = 197366457600.

The previous prime is 243121222177. The next prime is 243121222237. The reversal of 243121222201 is 102222121342.

It is not a de Polignac number, because 243121222201 - 2¹³ = 243121214009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243121222271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15121795 + ... + 15137863.

It is an arithmetic number, because the mean of its divisors is an integer number (9216980640).

Almost surely, 2^243121222201 is an apocalyptic number.

It is an amenable number.

243121222201 is a deficient number, since it is larger than the sum of its proper divisors (51822158279).

243121222201 is a wasteful number, since it uses less digits than its factorization.

243121222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19537.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 243121222201 its reverse (102222121342), we get a palindrome (345343343543).

The spelling of 243121222201 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred one".