21202103347 has 2 divisors, whose sum is σ = 21202103348. Its totient is φ = 21202103346.

The previous prime is 21202103323. The next prime is 21202103359. The reversal of 21202103347 is 74330120212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202103347 - 2¹¹ = 21202101299 is a prime.

It is not a weakly prime, because it can be changed into another prime (21202103647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601051673 + 10601051674.

It is an arithmetic number, because the mean of its divisors is an integer number (10601051674).

Almost surely, 2^21202103347 is an apocalyptic number.

21202103347 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202103347 is an equidigital number, since it uses as much as digits as its factorization.

21202103347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 21202103347 its reverse (74330120212), we get a palindrome (95532223559).

The spelling of 21202103347 in words is "twenty-one billion, two hundred two million, one hundred three thousand, three hundred forty-seven".