121222212201 has 10 divisors (see below), whose sum is σ = 181085033162. Its totient is φ = 80814808080.

The previous prime is 121222212187. The next prime is 121222212211. The reversal of 121222212201 is 102212222121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 106503669801 + 14718542400 = 326349^2 + 121320^2 .

It is not a de Polignac number, because 121222212201 - 2²⁵ = 121188657769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121222212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 748285180 + ... + 748285341.

Almost surely, 2^121222212201 is an apocalyptic number.

It is an amenable number.

121222212201 is a deficient number, since it is larger than the sum of its proper divisors (59862820961).

121222212201 is an equidigital number, since it uses as much as digits as its factorization.

121222212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496570533 (or 1496570524 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121222212201 its reverse (102212222121), we get a palindrome (223434434322).

The spelling of 121222212201 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred one".