212401213433221 has 8 divisors (see below), whose sum is σ = 218736178572800. Its totient is φ = 206097532072848.

The previous prime is 212401213433219. The next prime is 212401213433239. The reversal of 212401213433221 is 122334312104212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212401213433221 - 2¹ = 212401213433219 is a prime.

It is a super-2 number, since 2×212401213433221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212401213433921) 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 7 ways as a sum of consecutive naturals, for example, 7820931021 + ... + 7820958178.

It is an arithmetic number, because the mean of its divisors is an integer number (27342022321600).

Almost surely, 2^{212401213433221} is an apocalyptic number.

It is an amenable number.

212401213433221 is a deficient number, since it is larger than the sum of its proper divisors (6334965139579).

212401213433221 is a wasteful number, since it uses less digits than its factorization.

212401213433221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15641889603.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 212401213433221 its reverse (122334312104212), we get a palindrome (334735525537433).

The spelling of 212401213433221 in words is "two hundred twelve trillion, four hundred one billion, two hundred thirteen million, four hundred thirty-three thousand, two hundred twenty-one".