42011211211009 has 2 divisors, whose sum is σ = 42011211211010. Its totient is φ = 42011211211008.

The previous prime is 42011211210989. The next prime is 42011211211027. The reversal of 42011211211009 is 90011211211024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40964518524609 + 1046692686400 = 6400353^2 + 1023080^2 .

It is a cyclic number.

It is not a de Polignac number, because 42011211211009 - 2⁹ = 42011211210497 is a prime.

It is not a weakly prime, because it can be changed into another prime (42011211211609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21005605605504 + 21005605605505.

It is an arithmetic number, because the mean of its divisors is an integer number (21005605605505).

Almost surely, 2^{42011211211009} is an apocalyptic number.

It is an amenable number.

42011211211009 is a deficient number, since it is larger than the sum of its proper divisors (1).

42011211211009 is an equidigital number, since it uses as much as digits as its factorization.

42011211211009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 42011211211009 in words is "forty-two trillion, eleven billion, two hundred eleven million, two hundred eleven thousand, nine".