121420201 has 4 divisors (see below), whose sum is σ = 138765952. Its totient is φ = 104074452.

The previous prime is 121420181. The next prime is 121420207. The reversal of 121420201 is 102024121.

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 121420201 - 2⁹ = 121419689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121420207) 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, 8672865 + ... + 8672878.

It is an arithmetic number, because the mean of its divisors is an integer number (34691488).

Almost surely, 2^121420201 is an apocalyptic number.

It is an amenable number.

121420201 is a deficient number, since it is larger than the sum of its proper divisors (17345751).

121420201 is an equidigital number, since it uses as much as digits as its factorization.

121420201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17345750.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 121420201 is about 11019.0834918336. The cubic root of 121420201 is about 495.1806312853.

Adding to 121420201 its reverse (102024121), we get a palindrome (223444322).

The spelling of 121420201 in words is "one hundred twenty-one million, four hundred twenty thousand, two hundred one".