121222222201 has 4 divisors (see below), whose sum is σ = 128352941172. Its totient is φ = 114091503232.

The previous prime is 121222222169. The next prime is 121222222217. The reversal of 121222222201 is 102222222121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 102222222121 = 56873 ⋅1797377.

It can be written as a sum of positive squares in 2 ways, for example, as 61844229225 + 59377992976 = 248685^2 + 243676^2 .

It is not a de Polignac number, because 121222222201 - 2⁵ = 121222222169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222222291) 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, 3565359460 + ... + 3565359493.

It is an arithmetic number, because the mean of its divisors is an integer number (32088235293).

Almost surely, 2^121222222201 is an apocalyptic number.

It is an amenable number.

121222222201 is a deficient number, since it is larger than the sum of its proper divisors (7130718971).

121222222201 is an equidigital number, since it uses as much as digits as its factorization.

121222222201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7130718970.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121222222201 its reverse (102222222121), we get a palindrome (223444444322).

The spelling of 121222222201 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred one".