121220101011201 has 32 divisors (see below), whose sum is σ = 176602778726400. Its totient is φ = 73676471365440.

The previous prime is 121220101011133. The next prime is 121220101011203. The reversal of 121220101011201 is 102110101022121.

It is a happy number.

It is not a de Polignac number, because 121220101011201 - 2²³ = 121220092622593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220101011203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191309986 + ... + 191942571.

It is an arithmetic number, because the mean of its divisors is an integer number (5518836835200).

Almost surely, 2^{121220101011201} is an apocalyptic number.

It is an amenable number.

121220101011201 is a deficient number, since it is larger than the sum of its proper divisors (55382677715199).

121220101011201 is a wasteful number, since it uses less digits than its factorization.

121220101011201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383252789.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121220101011201 its reverse (102110101022121), we get a palindrome (223330202033322).

The spelling of 121220101011201 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred one million, eleven thousand, two hundred one".