21112002193 has 2 divisors, whose sum is σ = 21112002194. Its totient is φ = 21112002192.

The previous prime is 21112002181. The next prime is 21112002221. The reversal of 21112002193 is 39120021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13379086224 + 7732915969 = 115668^2 + 87937^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112002193 - 2²¹ = 21109905041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21112002173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556001096 + 10556001097.

It is an arithmetic number, because the mean of its divisors is an integer number (10556001097).

Almost surely, 2^21112002193 is an apocalyptic number.

It is an amenable number.

21112002193 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112002193 is an equidigital number, since it uses as much as digits as its factorization.

21112002193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21112002193 in words is "twenty-one billion, one hundred twelve million, two thousand, one hundred ninety-three".