21130411193 has 2 divisors, whose sum is σ = 21130411194. Its totient is φ = 21130411192.

The previous prime is 21130411123. The next prime is 21130411261. The reversal of 21130411193 is 39111403112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16407560464 + 4722850729 = 128092^2 + 68723^2 .

It is a cyclic number.

It is not a de Polignac number, because 21130411193 - 2¹² = 21130407097 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130411123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565205596 + 10565205597.

It is an arithmetic number, because the mean of its divisors is an integer number (10565205597).

Almost surely, 2^21130411193 is an apocalyptic number.

It is an amenable number.

21130411193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130411193 is an equidigital number, since it uses as much as digits as its factorization.

21130411193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 21130411193 in words is "twenty-one billion, one hundred thirty million, four hundred eleven thousand, one hundred ninety-three".