121201212122101 has 4 divisors (see below), whose sum is σ = 121835773442304. Its totient is φ = 120566650801900.

The previous prime is 121201212122093. The next prime is 121201212122173. The reversal of 121201212122101 is 101221212102121.

It is a happy number.

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 121201212122101 - 2³ = 121201212122093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121201212126101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317280659815 + ... + 317280660196.

It is an arithmetic number, because the mean of its divisors is an integer number (30458943360576).

Almost surely, 2^{121201212122101} is an apocalyptic number.

It is an amenable number.

121201212122101 is a deficient number, since it is larger than the sum of its proper divisors (634561320203).

121201212122101 is an equidigital number, since it uses as much as digits as its factorization.

121201212122101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634561320202.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121201212122101 its reverse (101221212102121), we get a palindrome (222422424224222).

The spelling of 121201212122101 in words is "one hundred twenty-one trillion, two hundred one billion, two hundred twelve million, one hundred twenty-two thousand, one hundred one".