21175152041 has 2 divisors, whose sum is σ = 21175152042. Its totient is φ = 21175152040.

The previous prime is 21175152029. The next prime is 21175152049. The reversal of 21175152041 is 14025157112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20724481600 + 450670441 = 143960^2 + 21229^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21175152041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21175151995 and 21175152013.

It is not a weakly prime, because it can be changed into another prime (21175152049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10587576020 + 10587576021.

It is an arithmetic number, because the mean of its divisors is an integer number (10587576021).

Almost surely, 2^21175152041 is an apocalyptic number.

It is an amenable number.

21175152041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21175152041 is an equidigital number, since it uses as much as digits as its factorization.

21175152041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 29.

The spelling of 21175152041 in words is "twenty-one billion, one hundred seventy-five million, one hundred fifty-two thousand, forty-one".