212743430221 has 8 divisors (see below), whose sum is σ = 243138957120. Its totient is φ = 182348805408.

The previous prime is 212743430147. The next prime is 212743430233. The reversal of 212743430221 is 122034347212.

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

It is not a de Polignac number, because 212743430221 - 2⁷ = 212743430093 is a prime.

It is a super-2 number, since 2×212743430221² (a number of 23 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 (212743410221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392910 + ... + 761488.

It is an arithmetic number, because the mean of its divisors is an integer number (30392369640).

Almost surely, 2^212743430221 is an apocalyptic number.

It is an amenable number.

212743430221 is a deficient number, since it is larger than the sum of its proper divisors (30395526899).

212743430221 is an equidigital number, since it uses as much as digits as its factorization.

212743430221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451043.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 212743430221 its reverse (122034347212), we get a palindrome (334777777433).

The spelling of 212743430221 in words is "two hundred twelve billion, seven hundred forty-three million, four hundred thirty thousand, two hundred twenty-one".