212144201321 has 16 divisors (see below), whose sum is σ = 241954333824. Its totient is φ = 184515560064.

The previous prime is 212144201303. The next prime is 212144201327. The reversal of 212144201321 is 123102441212.

It is a cyclic number.

It is not a de Polignac number, because 212144201321 - 2¹⁰ = 212144200297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212144201327) 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, 5274836 + ... + 5314901.

It is an arithmetic number, because the mean of its divisors is an integer number (15122145864).

Almost surely, 2^212144201321 is an apocalyptic number.

It is an amenable number.

212144201321 is a deficient number, since it is larger than the sum of its proper divisors (29810132503).

212144201321 is a wasteful number, since it uses less digits than its factorization.

212144201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10589840.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 212144201321 its reverse (123102441212), we get a palindrome (335246642533).

The spelling of 212144201321 in words is "two hundred twelve billion, one hundred forty-four million, two hundred one thousand, three hundred twenty-one".