212420301421 has 2 divisors, whose sum is σ = 212420301422. Its totient is φ = 212420301420.

The previous prime is 212420301409. The next prime is 212420301427. The reversal of 212420301421 is 124103024212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170564870025 + 41855431396 = 412995^2 + 204586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212420301421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212420301392 and 212420301401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212420301427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106210150710 + 106210150711.

It is an arithmetic number, because the mean of its divisors is an integer number (106210150711).

Almost surely, 2^212420301421 is an apocalyptic number.

It is an amenable number.

212420301421 is a deficient number, since it is larger than the sum of its proper divisors (1).

212420301421 is an equidigital number, since it uses as much as digits as its factorization.

212420301421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 212420301421 its reverse (124103024212), we get a palindrome (336523325633).

The spelling of 212420301421 in words is "two hundred twelve billion, four hundred twenty million, three hundred one thousand, four hundred twenty-one".