212214442421 has 4 divisors (see below), whose sum is σ = 212215369344. Its totient is φ = 212213515500.

The previous prime is 212214442417. The next prime is 212214442469. The reversal of 212214442421 is 124244412212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212214442421 - 2² = 212214442417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212214442411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155516 + ... + 669786.

It is an arithmetic number, because the mean of its divisors is an integer number (53053842336).

Almost surely, 2^212214442421 is an apocalyptic number.

It is an amenable number.

212214442421 is a deficient number, since it is larger than the sum of its proper divisors (926923).

212214442421 is an equidigital number, since it uses as much as digits as its factorization.

212214442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926922.

The product of its digits is 8192, while the sum is 29.

Adding to 212214442421 its reverse (124244412212), we get a palindrome (336458854633).

The spelling of 212214442421 in words is "two hundred twelve billion, two hundred fourteen million, four hundred forty-two thousand, four hundred twenty-one".