121221210201 has 96 divisors (see below), whose sum is σ = 204434576640. Its totient is φ = 63511789824.

The previous prime is 121221210169. The next prime is 121221210211. The reversal of 121221210201 is 102012122121.

It is not a de Polignac number, because 121221210201 - 2⁵ = 121221210169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221210211) 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 95 ways as a sum of consecutive naturals, for example, 113396295 + ... + 113397363.

It is an arithmetic number, because the mean of its divisors is an integer number (2129526840).

Almost surely, 2^121221210201 is an apocalyptic number.

It is an amenable number.

121221210201 is a deficient number, since it is larger than the sum of its proper divisors (83213366439).

121221210201 is an equidigital number, since it uses as much as digits as its factorization.

121221210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121221210201 its reverse (102012122121), we get a palindrome (223233332322).

The spelling of 121221210201 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred ten thousand, two hundred one".