121340030221 has 4 divisors (see below), whose sum is σ = 121539932032. Its totient is φ = 121140128412.

The previous prime is 121340030183. The next prime is 121340030291. The reversal of 121340030221 is 122030043121.

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 a de Polignac number, because none of the positive numbers 2^k-121340030221 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 (121340030291) 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, 99949995 + ... + 99951208.

It is an arithmetic number, because the mean of its divisors is an integer number (30384983008).

Almost surely, 2^121340030221 is an apocalyptic number.

It is an amenable number.

121340030221 is a deficient number, since it is larger than the sum of its proper divisors (199901811).

121340030221 is an equidigital number, since it uses as much as digits as its factorization.

121340030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199901810.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 121340030221 its reverse (122030043121), we get a palindrome (243370073342).

The spelling of 121340030221 in words is "one hundred twenty-one billion, three hundred forty million, thirty thousand, two hundred twenty-one".