121220113201 has 4 divisors (see below), whose sum is σ = 132240123504. Its totient is φ = 110200102900.

The previous prime is 121220113199. The next prime is 121220113213. The reversal of 121220113201 is 102311022121.

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 121220113201 - 2¹ = 121220113199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220113271) 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, 5510005135 + ... + 5510005156.

It is an arithmetic number, because the mean of its divisors is an integer number (33060030876).

Almost surely, 2^121220113201 is an apocalyptic number.

121220113201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121220113201 is a deficient number, since it is larger than the sum of its proper divisors (11020010303).

121220113201 is a wasteful number, since it uses less digits than its factorization.

121220113201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11020010302.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 121220113201 its reverse (102311022121), we get a palindrome (223531135322).

The spelling of 121220113201 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred thirteen thousand, two hundred one".