121321233220211 has 4 divisors (see below), whose sum is σ = 124142657248632. Its totient is φ = 118499809191792.

The previous prime is 121321233220189. The next prime is 121321233220223. The reversal of 121321233220211 is 112022332123121.

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 121321233220211 - 2³⁰ = 121320159478387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121321233220711) 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, 1410712014146 + ... + 1410712014231.

It is an arithmetic number, because the mean of its divisors is an integer number (31035664312158).

Almost surely, 2^{121321233220211} is an apocalyptic number.

121321233220211 is a deficient number, since it is larger than the sum of its proper divisors (2821424028421).

121321233220211 is an equidigital number, since it uses as much as digits as its factorization.

121321233220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821424028420.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 121321233220211 its reverse (112022332123121), we get a palindrome (233343565343332).

The spelling of 121321233220211 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred thirty-three million, two hundred twenty thousand, two hundred eleven".