21110133193 has 2 divisors, whose sum is σ = 21110133194. Its totient is φ = 21110133192.

The previous prime is 21110133139. The next prime is 21110133203. The reversal of 21110133193 is 39133101112.

Together with previous prime (21110133139) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19956647824 + 1153485369 = 141268^2 + 33963^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110133193 - 2²¹ = 21108036041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110133113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555066596 + 10555066597.

It is an arithmetic number, because the mean of its divisors is an integer number (10555066597).

Almost surely, 2^21110133193 is an apocalyptic number.

It is an amenable number.

21110133193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110133193 is an equidigital number, since it uses as much as digits as its factorization.

21110133193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The spelling of 21110133193 in words is "twenty-one billion, one hundred ten million, one hundred thirty-three thousand, one hundred ninety-three".