21431441041 has 2 divisors, whose sum is σ = 21431441042. Its totient is φ = 21431441040.

The previous prime is 21431441033. The next prime is 21431441081. The reversal of 21431441041 is 14014413412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13055347600 + 8376093441 = 114260^2 + 91521^2 .

It is a cyclic number.

It is not a de Polignac number, because 21431441041 - 2³ = 21431441033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21431440997 and 21431441015.

It is not a weakly prime, because it can be changed into another prime (21431441081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10715720520 + 10715720521.

It is an arithmetic number, because the mean of its divisors is an integer number (10715720521).

Almost surely, 2^21431441041 is an apocalyptic number.

It is an amenable number.

21431441041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21431441041 is an equidigital number, since it uses as much as digits as its factorization.

21431441041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21431441041 its reverse (14014413412), we get a palindrome (35445854453).

The spelling of 21431441041 in words is "twenty-one billion, four hundred thirty-one million, four hundred forty-one thousand, forty-one".