212243101421 has 8 divisors (see below), whose sum is σ = 230369255424. Its totient is φ = 194374056240.

The previous prime is 212243101379. The next prime is 212243101519. The reversal of 212243101421 is 124101342212.

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

It is a de Polignac number, because none of the positive numbers 2^k-212243101421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212243101121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64275485 + ... + 64278786.

It is an arithmetic number, because the mean of its divisors is an integer number (28796156928).

Almost surely, 2^212243101421 is an apocalyptic number.

It is an amenable number.

212243101421 is a deficient number, since it is larger than the sum of its proper divisors (18126154003).

212243101421 is a wasteful number, since it uses less digits than its factorization.

212243101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128554411.

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

Adding to 212243101421 its reverse (124101342212), we get a palindrome (336344443633).

The spelling of 212243101421 in words is "two hundred twelve billion, two hundred forty-three million, one hundred one thousand, four hundred twenty-one".