212012001321 has 4 divisors (see below), whose sum is σ = 282682668432. Its totient is φ = 141341334212.

The previous prime is 212012001307. The next prime is 212012001413. The reversal of 212012001321 is 123100210212.

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 212012001321 - 2¹⁰ = 212012000297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212012001321.

It is not an unprimeable number, because it can be changed into a prime (212012008321) 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, 35335333551 + ... + 35335333556.

It is an arithmetic number, because the mean of its divisors is an integer number (70670667108).

Almost surely, 2^212012001321 is an apocalyptic number.

It is an amenable number.

212012001321 is a deficient number, since it is larger than the sum of its proper divisors (70670667111).

212012001321 is an equidigital number, since it uses as much as digits as its factorization.

212012001321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70670667110.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212012001321 its reverse (123100210212), we get a palindrome (335112211533).

The spelling of 212012001321 in words is "two hundred twelve billion, twelve million, one thousand, three hundred twenty-one".