121244220211 has 4 divisors (see below), whose sum is σ = 121245893272. Its totient is φ = 121242547152.

The previous prime is 121244220199. The next prime is 121244220233. The reversal of 121244220211 is 112022442121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121244220211 - 2⁵ = 121244220179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121244220281) 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, 722661 + ... + 874486.

It is an arithmetic number, because the mean of its divisors is an integer number (30311473318).

Almost surely, 2^121244220211 is an apocalyptic number.

121244220211 is a deficient number, since it is larger than the sum of its proper divisors (1673061).

121244220211 is an equidigital number, since it uses as much as digits as its factorization.

121244220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673060.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 121244220211 its reverse (112022442121), we get a palindrome (233266662332).

The spelling of 121244220211 in words is "one hundred twenty-one billion, two hundred forty-four million, two hundred twenty thousand, two hundred eleven".