121440201 has 4 divisors (see below), whose sum is σ = 161920272. Its totient is φ = 80960132.

The previous prime is 121440199. The next prime is 121440239. The reversal of 121440201 is 102044121.

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 121440201 - 2¹ = 121440199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121440251) 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, 20240031 + ... + 20240036.

It is an arithmetic number, because the mean of its divisors is an integer number (40480068).

Almost surely, 2^121440201 is an apocalyptic number.

It is an amenable number.

121440201 is a deficient number, since it is larger than the sum of its proper divisors (40480071).

121440201 is an equidigital number, since it uses as much as digits as its factorization.

121440201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40480070.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 121440201 is about 11019.9909709582. The cubic root of 121440201 is about 495.2078180544.

Adding to 121440201 its reverse (102044121), we get a palindrome (223484322).

The spelling of 121440201 in words is "one hundred twenty-one million, four hundred forty thousand, two hundred one".