211120122220121 has 4 divisors (see below), whose sum is σ = 211120184943744. Its totient is φ = 211120059496500.

The previous prime is 211120122220097. The next prime is 211120122220151. The reversal of 211120122220121 is 121022221021112.

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 211120122220121 - 2²⁶ = 211120055111257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211120122220093 and 211120122220102.

It is not an unprimeable number, because it can be changed into a prime (211120122220151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26008385 + ... + 33146286.

It is an arithmetic number, because the mean of its divisors is an integer number (52780046235936).

Almost surely, 2^{211120122220121} is an apocalyptic number.

It is an amenable number.

211120122220121 is a deficient number, since it is larger than the sum of its proper divisors (62723623).

211120122220121 is an equidigital number, since it uses as much as digits as its factorization.

211120122220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62723622.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211120122220121 its reverse (121022221021112), we get a palindrome (332142343241233).

The spelling of 211120122220121 in words is "two hundred eleven trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twenty thousand, one hundred twenty-one".