212201144021 has 2 divisors, whose sum is σ = 212201144022. Its totient is φ = 212201144020.

The previous prime is 212201144003. The next prime is 212201144033. The reversal of 212201144021 is 120441102212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196093980625 + 16107163396 = 442825^2 + 126914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212201144021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212201143984 and 212201144002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212201344021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106100572010 + 106100572011.

It is an arithmetic number, because the mean of its divisors is an integer number (106100572011).

Almost surely, 2^212201144021 is an apocalyptic number.

It is an amenable number.

212201144021 is a deficient number, since it is larger than the sum of its proper divisors (1).

212201144021 is an equidigital number, since it uses as much as digits as its factorization.

212201144021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212201144021 its reverse (120441102212), we get a palindrome (332642246233).

The spelling of 212201144021 in words is "two hundred twelve billion, two hundred one million, one hundred forty-four thousand, twenty-one".