21130023041 has 2 divisors, whose sum is σ = 21130023042. Its totient is φ = 21130023040.

The previous prime is 21130023037. The next prime is 21130023071. The reversal of 21130023041 is 14032003112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11046850816 + 10083172225 = 105104^2 + 100415^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130023041 - 2² = 21130023037 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130023071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565011520 + 10565011521.

It is an arithmetic number, because the mean of its divisors is an integer number (10565011521).

Almost surely, 2^21130023041 is an apocalyptic number.

It is an amenable number.

21130023041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130023041 is an equidigital number, since it uses as much as digits as its factorization.

21130023041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21130023041 its reverse (14032003112), we get a palindrome (35162026153).

The spelling of 21130023041 in words is "twenty-one billion, one hundred thirty million, twenty-three thousand, forty-one".