21338102790541 has 2 divisors, whose sum is σ = 21338102790542. Its totient is φ = 21338102790540.

The previous prime is 21338102790523. The next prime is 21338102790707. The reversal of 21338102790541 is 14509720183312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15140044422441 + 6198058368100 = 3891021^2 + 2489590^2 .

It is a cyclic number.

It is not a de Polignac number, because 21338102790541 - 2⁷ = 21338102790413 is a prime.

It is a super-2 number, since 2×21338102790541² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21338102790491 and 21338102790500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21338102790941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10669051395270 + 10669051395271.

It is an arithmetic number, because the mean of its divisors is an integer number (10669051395271).

Almost surely, 2^{21338102790541} is an apocalyptic number.

It is an amenable number.

21338102790541 is a deficient number, since it is larger than the sum of its proper divisors (1).

21338102790541 is an equidigital number, since it uses as much as digits as its factorization.

21338102790541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 21338102790541 in words is "twenty-one trillion, three hundred thirty-eight billion, one hundred two million, seven hundred ninety thousand, five hundred forty-one".