210332121421 has 2 divisors, whose sum is σ = 210332121422. Its totient is φ = 210332121420.

The previous prime is 210332121413. The next prime is 210332121457. The reversal of 210332121421 is 124121233012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196125865321 + 14206256100 = 442861^2 + 119190^2 .

It is a cyclic number.

It is not a de Polignac number, because 210332121421 - 2³ = 210332121413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210332121392 and 210332121401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210332131421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105166060710 + 105166060711.

It is an arithmetic number, because the mean of its divisors is an integer number (105166060711).

Almost surely, 2^210332121421 is an apocalyptic number.

It is an amenable number.

210332121421 is a deficient number, since it is larger than the sum of its proper divisors (1).

210332121421 is an equidigital number, since it uses as much as digits as its factorization.

210332121421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 210332121421 its reverse (124121233012), we get a palindrome (334453354433).

The spelling of 210332121421 in words is "two hundred ten billion, three hundred thirty-two million, one hundred twenty-one thousand, four hundred twenty-one".