10223443421 has 2 divisors, whose sum is σ = 10223443422. Its totient is φ = 10223443420.

The previous prime is 10223443409. The next prime is 10223443423. The reversal of 10223443421 is 12434432201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8466576196 + 1756867225 = 92014^2 + 41915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10223443421 is a prime.

Together with 10223443423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10223443423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111721710 + 5111721711.

It is an arithmetic number, because the mean of its divisors is an integer number (5111721711).

Almost surely, 2^10223443421 is an apocalyptic number.

It is an amenable number.

10223443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

10223443421 is an equidigital number, since it uses as much as digits as its factorization.

10223443421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 10223443421 its reverse (12434432201), we get a palindrome (22657875622).

It can be divided in two parts, 1022 and 3443421, that added together give a palindrome (3444443).

The spelling of 10223443421 in words is "ten billion, two hundred twenty-three million, four hundred forty-three thousand, four hundred twenty-one".