212112120421 has 8 divisors (see below), whose sum is σ = 219649582080. Its totient is φ = 204589542192.

The previous prime is 212112120397. The next prime is 212112120449. The reversal of 212112120421 is 124021211212.

212112120421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212112120421 - 2²¹ = 212110023269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212112129421) 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, 3691845 + ... + 3748858.

It is an arithmetic number, because the mean of its divisors is an integer number (27456197760).

Almost surely, 2^212112120421 is an apocalyptic number.

It is an amenable number.

212112120421 is a deficient number, since it is larger than the sum of its proper divisors (7537461659).

212112120421 is an equidigital number, since it uses as much as digits as its factorization.

212112120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441715.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212112120421 its reverse (124021211212), we get a palindrome (336133331633).

The spelling of 212112120421 in words is "two hundred twelve billion, one hundred twelve million, one hundred twenty thousand, four hundred twenty-one".