10213432421 has 2 divisors, whose sum is σ = 10213432422. Its totient is φ = 10213432420.

The previous prime is 10213432399. The next prime is 10213432433. The reversal of 10213432421 is 12423431201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9392323396 + 821109025 = 96914^2 + 28655^2 .

It is a cyclic number.

It is not a de Polignac number, because 10213432421 - 2¹⁸ = 10213170277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10213432441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106716210 + 5106716211.

It is an arithmetic number, because the mean of its divisors is an integer number (5106716211).

Almost surely, 2^10213432421 is an apocalyptic number.

It is an amenable number.

10213432421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10213432421 is an equidigital number, since it uses as much as digits as its factorization.

10213432421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 10213432421 its reverse (12423431201), we get a palindrome (22636863622).

The spelling of 10213432421 in words is "ten billion, two hundred thirteen million, four hundred thirty-two thousand, four hundred twenty-one".