21000322103 has 2 divisors, whose sum is σ = 21000322104. Its totient is φ = 21000322102.

The previous prime is 21000322093. The next prime is 21000322111. The reversal of 21000322103 is 30122300012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21000322103 - 2⁶ = 21000322039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000322163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500161051 + 10500161052.

It is an arithmetic number, because the mean of its divisors is an integer number (10500161052).

Almost surely, 2^21000322103 is an apocalyptic number.

21000322103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000322103 is an equidigital number, since it uses as much as digits as its factorization.

21000322103 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 14.

Adding to 21000322103 its reverse (30122300012), we get a palindrome (51122622115).

The spelling of 21000322103 in words is "twenty-one billion, three hundred twenty-two thousand, one hundred three".