21243077341 has 2 divisors, whose sum is σ = 21243077342. Its totient is φ = 21243077340.

The previous prime is 21243077299. The next prime is 21243077347. The reversal of 21243077341 is 14377034212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21156866116 + 86211225 = 145454^2 + 9285^2 .

It is a cyclic number.

It is not a de Polignac number, because 21243077341 - 2⁷ = 21243077213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21243077297 and 21243077306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21243077347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10621538670 + 10621538671.

It is an arithmetic number, because the mean of its divisors is an integer number (10621538671).

Almost surely, 2^21243077341 is an apocalyptic number.

It is an amenable number.

21243077341 is a deficient number, since it is larger than the sum of its proper divisors (1).

21243077341 is an equidigital number, since it uses as much as digits as its factorization.

21243077341 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The spelling of 21243077341 in words is "twenty-one billion, two hundred forty-three million, seventy-seven thousand, three hundred forty-one".