211120200022121 has 4 divisors (see below), whose sum is σ = 227360215408452. Its totient is φ = 194880184635792.

The previous prime is 211120200022099. The next prime is 211120200022159. The reversal of 211120200022121 is 121220002021112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 107101904490025 + 104018295532096 = 10349005^2 + 10198936^2 .

It is a cyclic number.

It is not a de Polignac number, because 211120200022121 - 2³⁰ = 211119126280297 is a prime.

It is a super-3 number, since 3×211120200022121³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211120200022121.

It is not an unprimeable number, because it can be changed into a prime (211120200022621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8120007693146 + ... + 8120007693171.

It is an arithmetic number, because the mean of its divisors is an integer number (56840053852113).

Almost surely, 2^{211120200022121} is an apocalyptic number.

It is an amenable number.

211120200022121 is a deficient number, since it is larger than the sum of its proper divisors (16240015386331).

211120200022121 is a wasteful number, since it uses less digits than its factorization.

211120200022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16240015386330.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211120200022121 its reverse (121220002021112), we get a palindrome (332340202043233).

The spelling of 211120200022121 in words is "two hundred eleven trillion, one hundred twenty billion, two hundred million, twenty-two thousand, one hundred twenty-one".