121220101210201 has 4 divisors (see below), whose sum is σ = 138537258525952. Its totient is φ = 103902943894452.

The previous prime is 121220101210171. The next prime is 121220101210301. The reversal of 121220101210201 is 102012101022121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121220101210201 - 2⁹ = 121220101209689 is a prime.

It is a super-2 number, since 2×121220101210201² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220101210001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658578657865 + ... + 8658578657878.

It is an arithmetic number, because the mean of its divisors is an integer number (34634314631488).

Almost surely, 2^{121220101210201} is an apocalyptic number.

It is an amenable number.

121220101210201 is a deficient number, since it is larger than the sum of its proper divisors (17317157315751).

121220101210201 is an equidigital number, since it uses as much as digits as its factorization.

121220101210201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17317157315750.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121220101210201 its reverse (102012101022121), we get a palindrome (223232202232322).

The spelling of 121220101210201 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred one million, two hundred ten thousand, two hundred one".