121220330211 has 6 divisors (see below), whose sum is σ = 175096032540. Its totient is φ = 80813553468.

The previous prime is 121220330191. The next prime is 121220330213. The reversal of 121220330211 is 112033022121.

121220330211 is a `hidden beast` number, since 1 + 2 + 122 + 0 + 330 + 211 = 666.

It is not a de Polignac number, because 121220330211 - 2²⁶ = 121153221347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121220330213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6734462781 + ... + 6734462798.

It is an arithmetic number, because the mean of its divisors is an integer number (29182672090).

Almost surely, 2^121220330211 is an apocalyptic number.

121220330211 is a deficient number, since it is larger than the sum of its proper divisors (53875702329).

121220330211 is a wasteful number, since it uses less digits than its factorization.

121220330211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13468925585 (or 13468925582 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 121220330211 its reverse (112033022121), we get a palindrome (233253352332).

The spelling of 121220330211 in words is "one hundred twenty-one billion, two hundred twenty million, three hundred thirty thousand, two hundred eleven".