21203324141 has 2 divisors, whose sum is σ = 21203324142. Its totient is φ = 21203324140.

The previous prime is 21203324083. The next prime is 21203324159. The reversal of 21203324141 is 14142330212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19720304041 + 1483020100 = 140429^2 + 38510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21203324141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21203320141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601662070 + 10601662071.

It is an arithmetic number, because the mean of its divisors is an integer number (10601662071).

Almost surely, 2^21203324141 is an apocalyptic number.

It is an amenable number.

21203324141 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203324141 is an equidigital number, since it uses as much as digits as its factorization.

21203324141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21203324141 its reverse (14142330212), we get a palindrome (35345654353).

The spelling of 21203324141 in words is "twenty-one billion, two hundred three million, three hundred twenty-four thousand, one hundred forty-one".