21612631317041 has 2 divisors, whose sum is σ = 21612631317042. Its totient is φ = 21612631317040.

The previous prime is 21612631317019. The next prime is 21612631317089. The reversal of 21612631317041 is 14071313621612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14727780107041 + 6884851210000 = 3837679^2 + 2623900^2 .

It is a cyclic number.

It is not a de Polignac number, because 21612631317041 - 2¹⁴ = 21612631300657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21612631316986 and 21612631317004.

It is not a weakly prime, because it can be changed into another prime (21612631337041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10806315658520 + 10806315658521.

It is an arithmetic number, because the mean of its divisors is an integer number (10806315658521).

Almost surely, 2^{21612631317041} is an apocalyptic number.

It is an amenable number.

21612631317041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21612631317041 is an equidigital number, since it uses as much as digits as its factorization.

21612631317041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

Adding to 21612631317041 its reverse (14071313621612), we get a palindrome (35683944938653).

The spelling of 21612631317041 in words is "twenty-one trillion, six hundred twelve billion, six hundred thirty-one million, three hundred seventeen thousand, forty-one".