211122020321 has 4 divisors (see below), whose sum is σ = 213058919700. Its totient is φ = 209185120944.

The previous prime is 211122020309. The next prime is 211122020353. The reversal of 211122020321 is 123020221112.

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 90321286225 + 120800734096 = 300535^2 + 347564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211122020321 is a prime.

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 211122020321.

It is not an unprimeable number, because it can be changed into a prime (211122020521) 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, 968449526 + ... + 968449743.

It is an arithmetic number, because the mean of its divisors is an integer number (53264729925).

Almost surely, 2^211122020321 is an apocalyptic number.

It is an amenable number.

211122020321 is a deficient number, since it is larger than the sum of its proper divisors (1936899379).

211122020321 is a wasteful number, since it uses less digits than its factorization.

211122020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936899378.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 211122020321 its reverse (123020221112), we get a palindrome (334142241433).

The spelling of 211122020321 in words is "two hundred eleven billion, one hundred twenty-two million, twenty thousand, three hundred twenty-one".