121212422201 has 4 divisors (see below), whose sum is σ = 130536454692. Its totient is φ = 111888389712.

The previous prime is 121212422197. The next prime is 121212422237. The reversal of 121212422201 is 102224212121.

It is a happy number.

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 44657832976 + 76554589225 = 211324^2 + 276685^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212422201 - 2² = 121212422197 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212422251) 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 3 ways as a sum of consecutive naturals, for example, 4662016226 + ... + 4662016251.

It is an arithmetic number, because the mean of its divisors is an integer number (32634113673).

Almost surely, 2^121212422201 is an apocalyptic number.

It is an amenable number.

121212422201 is a deficient number, since it is larger than the sum of its proper divisors (9324032491).

121212422201 is an equidigital number, since it uses as much as digits as its factorization.

121212422201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324032490.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 121212422201 its reverse (102224212121), we get a palindrome (223436634322).

The spelling of 121212422201 in words is "one hundred twenty-one billion, two hundred twelve million, four hundred twenty-two thousand, two hundred one".