42121011193 has 2 divisors, whose sum is σ = 42121011194. Its totient is φ = 42121011192.

The previous prime is 42121011181. The next prime is 42121011211. The reversal of 42121011193 is 39111012124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39341929104 + 2779082089 = 198348^2 + 52717^2 .

It is a cyclic number.

It is not a de Polignac number, because 42121011193 - 2¹⁷ = 42120880121 is a prime.

It is not a weakly prime, because it can be changed into another prime (42121011173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060505596 + 21060505597.

It is an arithmetic number, because the mean of its divisors is an integer number (21060505597).

Almost surely, 2^42121011193 is an apocalyptic number.

It is an amenable number.

42121011193 is a deficient number, since it is larger than the sum of its proper divisors (1).

42121011193 is an equidigital number, since it uses as much as digits as its factorization.

42121011193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 42121011193 in words is "forty-two billion, one hundred twenty-one million, eleven thousand, one hundred ninety-three".