21193745573041 has 2 divisors, whose sum is σ = 21193745573042. Its totient is φ = 21193745573040.

The previous prime is 21193745573029. The next prime is 21193745573057. The reversal of 21193745573041 is 14037554739112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21083341555600 + 110404017441 = 4591660^2 + 332271^2 .

It is a cyclic number.

It is not a de Polignac number, because 21193745573041 - 2²¹ = 21193743475889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21193745573041.

It is not a weakly prime, because it can be changed into another prime (21193745571041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10596872786520 + 10596872786521.

It is an arithmetic number, because the mean of its divisors is an integer number (10596872786521).

Almost surely, 2^{21193745573041} is an apocalyptic number.

It is an amenable number.

21193745573041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21193745573041 is an equidigital number, since it uses as much as digits as its factorization.

21193745573041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 21193745573041 in words is "twenty-one trillion, one hundred ninety-three billion, seven hundred forty-five million, five hundred seventy-three thousand, forty-one".