21302100103 has 2 divisors, whose sum is σ = 21302100104. Its totient is φ = 21302100102.

The previous prime is 21302100073. The next prime is 21302100163. The reversal of 21302100103 is 30100120312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302100103 - 2¹³ = 21302091911 is a prime.

It is a super-2 number, since 2×21302100103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302100163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651050051 + 10651050052.

It is an arithmetic number, because the mean of its divisors is an integer number (10651050052).

Almost surely, 2^21302100103 is an apocalyptic number.

21302100103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302100103 is an equidigital number, since it uses as much as digits as its factorization.

21302100103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21302100103 its reverse (30100120312), we get a palindrome (51402220415).

The spelling of 21302100103 in words is "twenty-one billion, three hundred two million, one hundred thousand, one hundred three".