212222144021 has 4 divisors (see below), whose sum is σ = 212230814112. Its totient is φ = 212213473932.

The previous prime is 212222143949. The next prime is 212222144039. The reversal of 212222144021 is 120441222212.

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.

It is a cyclic number.

It is not a de Polignac number, because 212222144021 - 2³⁰ = 211148402197 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 (212222144081) 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, 4298225 + ... + 4347318.

It is an arithmetic number, because the mean of its divisors is an integer number (53057703528).

Almost surely, 2^212222144021 is an apocalyptic number.

It is an amenable number.

212222144021 is a deficient number, since it is larger than the sum of its proper divisors (8670091).

212222144021 is an equidigital number, since it uses as much as digits as its factorization.

212222144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8670090.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 212222144021 its reverse (120441222212), we get a palindrome (332663366233).

The spelling of 212222144021 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred forty-four thousand, twenty-one".