212212144402321 has 16 divisors (see below), whose sum is σ = 247548918343680. Its totient is φ = 178153311450960.

The previous prime is 212212144402301. The next prime is 212212144402327. The reversal of 212212144402321 is 123204441212212.

It is a cyclic number.

It is not a de Polignac number, because 212212144402321 - 2³⁹ = 211662388588433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212212144402327) 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, 947915491 + ... + 948139336.

It is an arithmetic number, because the mean of its divisors is an integer number (15471807396480).

Almost surely, 2^{212212144402321} is an apocalyptic number.

It is an amenable number.

212212144402321 is a deficient number, since it is larger than the sum of its proper divisors (35336773941359).

212212144402321 is a wasteful number, since it uses less digits than its factorization.

212212144402321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896055164.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 212212144402321 its reverse (123204441212212), we get a palindrome (335416585614533).

The spelling of 212212144402321 in words is "two hundred twelve trillion, two hundred twelve billion, one hundred forty-four million, four hundred two thousand, three hundred twenty-one".