211221322020231 has 4 divisors (see below), whose sum is σ = 281628429360312. Its totient is φ = 140814214680152.

The previous prime is 211221322020223. The next prime is 211221322020353. The reversal of 211221322020231 is 132020223122112.

211221322020231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211221322020231 - 2³ = 211221322020223 is a prime.

It is a super-3 number, since 3×211221322020231³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211221322028231) 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, 35203553670036 + ... + 35203553670041.

It is an arithmetic number, because the mean of its divisors is an integer number (70407107340078).

Almost surely, 2^{211221322020231} is an apocalyptic number.

211221322020231 is a deficient number, since it is larger than the sum of its proper divisors (70407107340081).

211221322020231 is an equidigital number, since it uses as much as digits as its factorization.

211221322020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70407107340080.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 211221322020231 its reverse (132020223122112), we get a palindrome (343241545142343).

The spelling of 211221322020231 in words is "two hundred eleven trillion, two hundred twenty-one billion, three hundred twenty-two million, twenty thousand, two hundred thirty-one".