42147474121 has 2 divisors, whose sum is σ = 42147474122. Its totient is φ = 42147474120.

The previous prime is 42147474101. The next prime is 42147474137. The reversal of 42147474121 is 12147474124.

42147474121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36037706896 + 6109767225 = 189836^2 + 78165^2 .

It is a cyclic number.

It is not a de Polignac number, because 42147474121 - 2⁷ = 42147473993 is a prime.

It is not a weakly prime, because it can be changed into another prime (42147474101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21073737060 + 21073737061.

It is an arithmetic number, because the mean of its divisors is an integer number (21073737061).

Almost surely, 2^42147474121 is an apocalyptic number.

It is an amenable number.

42147474121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42147474121 is an equidigital number, since it uses as much as digits as its factorization.

42147474121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50176, while the sum is 37.

The spelling of 42147474121 in words is "forty-two billion, one hundred forty-seven million, four hundred seventy-four thousand, one hundred twenty-one".