121221000201 has 64 divisors (see below), whose sum is σ = 193875849216. Its totient is φ = 65937715200.

The previous prime is 121221000191. The next prime is 121221000311. The reversal of 121221000201 is 102000122121.

It is not a de Polignac number, because 121221000201 - 2⁵ = 121221000169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121221001201) 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 63 ways as a sum of consecutive naturals, for example, 5919486 + ... + 5939928.

It is an arithmetic number, because the mean of its divisors is an integer number (3029310144).

Almost surely, 2^121221000201 is an apocalyptic number.

It is an amenable number.

121221000201 is a deficient number, since it is larger than the sum of its proper divisors (72654849015).

121221000201 is a wasteful number, since it uses less digits than its factorization.

121221000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20662.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 121221000201 its reverse (102000122121), we get a palindrome (223221122322).

The spelling of 121221000201 in words is "one hundred twenty-one billion, two hundred twenty-one million, two hundred one", and thus it is an aban number.