211233321021 has 16 divisors (see below), whose sum is σ = 283007684160. Its totient is φ = 140141166720.

The previous prime is 211233321011. The next prime is 211233321071. The reversal of 211233321021 is 120123332112.

It is not a de Polignac number, because 211233321021 - 2¹¹ = 211233318973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211233321011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1407706 + ... + 1550516.

It is an arithmetic number, because the mean of its divisors is an integer number (17687980260).

Almost surely, 2^211233321021 is an apocalyptic number.

It is an amenable number.

211233321021 is a deficient number, since it is larger than the sum of its proper divisors (71774363139).

211233321021 is a wasteful number, since it uses less digits than its factorization.

211233321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145196.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 211233321021 its reverse (120123332112), we get a palindrome (331356653133).

The spelling of 211233321021 in words is "two hundred eleven billion, two hundred thirty-three million, three hundred twenty-one thousand, twenty-one".