211122020221 has 8 divisors (see below), whose sum is σ = 241286040320. Its totient is φ = 180958933008.

The previous prime is 211122020191. The next prime is 211122020261. The reversal of 211122020221 is 122020221112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-211122020221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211122020195 and 211122020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122020261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348460 + ... + 737338.

It is an arithmetic number, because the mean of its divisors is an integer number (30160755040).

Almost surely, 2^211122020221 is an apocalyptic number.

It is an amenable number.

211122020221 is a deficient number, since it is larger than the sum of its proper divisors (30164020099).

211122020221 is an equidigital number, since it uses as much as digits as its factorization.

211122020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466443.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211122020221 its reverse (122020221112), we get a palindrome (333142241333).

The spelling of 211122020221 in words is "two hundred eleven billion, one hundred twenty-two million, twenty thousand, two hundred twenty-one".