21130123101193 has 2 divisors, whose sum is σ = 21130123101194. Its totient is φ = 21130123101192.

The previous prime is 21130123101049. The next prime is 21130123101293. The reversal of 21130123101193 is 39110132103112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20414926450944 + 715196650249 = 4518288^2 + 845693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21130123101193 is a prime.

It is not a weakly prime, because it can be changed into another prime (21130123101293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565061550596 + 10565061550597.

It is an arithmetic number, because the mean of its divisors is an integer number (10565061550597).

Almost surely, 2^{21130123101193} is an apocalyptic number.

It is an amenable number.

21130123101193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130123101193 is an equidigital number, since it uses as much as digits as its factorization.

21130123101193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The spelling of 21130123101193 in words is "twenty-one trillion, one hundred thirty billion, one hundred twenty-three million, one hundred one thousand, one hundred ninety-three".