211332023221 has 4 divisors (see below), whose sum is σ = 230544025344. Its totient is φ = 192120021100.

The previous prime is 211332023207. The next prime is 211332023249. The reversal of 211332023221 is 122320233112.

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 211332023221 - 2⁷ = 211332023093 is a prime.

It is a super-2 number, since 2×211332023221² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211332023192 and 211332023201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211332023261) 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, 9606001045 + ... + 9606001066.

It is an arithmetic number, because the mean of its divisors is an integer number (57636006336).

Almost surely, 2^211332023221 is an apocalyptic number.

It is an amenable number.

211332023221 is a deficient number, since it is larger than the sum of its proper divisors (19212002123).

211332023221 is a wasteful number, since it uses less digits than its factorization.

211332023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19212002122.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 211332023221 its reverse (122320233112), we get a palindrome (333652256333).

The spelling of 211332023221 in words is "two hundred eleven billion, three hundred thirty-two million, twenty-three thousand, two hundred twenty-one".