211212032321 has 4 divisors (see below), whose sum is σ = 211343466432. Its totient is φ = 211080598212.

The previous prime is 211212032287. The next prime is 211212032329. The reversal of 211212032321 is 123230212112.

211212032321 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211212032321 is a prime.

It is a super-2 number, since 2×211212032321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211212032293 and 211212032302.

It is not an unprimeable number, because it can be changed into a prime (211212032329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65714645 + ... + 65717858.

It is an arithmetic number, because the mean of its divisors is an integer number (52835866608).

Almost surely, 2^211212032321 is an apocalyptic number.

It is an amenable number.

211212032321 is a deficient number, since it is larger than the sum of its proper divisors (131434111).

211212032321 is a wasteful number, since it uses less digits than its factorization.

211212032321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131434110.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 211212032321 its reverse (123230212112), we get a palindrome (334442244433).

The spelling of 211212032321 in words is "two hundred eleven billion, two hundred twelve million, thirty-two thousand, three hundred twenty-one".