212031010321 has 32 divisors (see below), whose sum is σ = 249689664000. Its totient is φ = 178275541248.

The previous prime is 212031010297. The next prime is 212031010333. The reversal of 212031010321 is 123010130212.

It is a cyclic number.

It is not a de Polignac number, because 212031010321 - 2²¹ = 212028913169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212031010295 and 212031010304.

It is not an unprimeable number, because it can be changed into a prime (212031010381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1650031 + ... + 1773883.

It is an arithmetic number, because the mean of its divisors is an integer number (7802802000).

Almost surely, 2^212031010321 is an apocalyptic number.

It is an amenable number.

212031010321 is a deficient number, since it is larger than the sum of its proper divisors (37658653679).

212031010321 is a wasteful number, since it uses less digits than its factorization.

212031010321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124153.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212031010321 its reverse (123010130212), we get a palindrome (335041140533).

The spelling of 212031010321 in words is "two hundred twelve billion, thirty-one million, ten thousand, three hundred twenty-one".