21141124013 has 2 divisors, whose sum is σ = 21141124014. Its totient is φ = 21141124012.

The previous prime is 21141124007. The next prime is 21141124057. The reversal of 21141124013 is 31042114112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14322823684 + 6818300329 = 119678^2 + 82573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21141124013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21141124073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570562006 + 10570562007.

It is an arithmetic number, because the mean of its divisors is an integer number (10570562007).

Almost surely, 2^21141124013 is an apocalyptic number.

It is an amenable number.

21141124013 is a deficient number, since it is larger than the sum of its proper divisors (1).

21141124013 is an equidigital number, since it uses as much as digits as its factorization.

21141124013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21141124013 its reverse (31042114112), we get a palindrome (52183238125).

Subtracting 21141124013 from its reverse (31042114112), we obtain a palindrome (9900990099).

The spelling of 21141124013 in words is "twenty-one billion, one hundred forty-one million, one hundred twenty-four thousand, thirteen".