21202113103 has 2 divisors, whose sum is σ = 21202113104. Its totient is φ = 21202113102.

The previous prime is 21202113077. The next prime is 21202113109. The reversal of 21202113103 is 30131120212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202113103 - 2²¹ = 21200015951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202113109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601056551 + 10601056552.

It is an arithmetic number, because the mean of its divisors is an integer number (10601056552).

Almost surely, 2^21202113103 is an apocalyptic number.

21202113103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202113103 is an equidigital number, since it uses as much as digits as its factorization.

21202113103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21202113103 its reverse (30131120212), we get a palindrome (51333233315).

The spelling of 21202113103 in words is "twenty-one billion, two hundred two million, one hundred thirteen thousand, one hundred three".