42530666121 has 12 divisors (see below), whose sum is σ = 61520830020. Its totient is φ = 28313325600.

The previous prime is 42530666107. The next prime is 42530666149. The reversal of 42530666121 is 12166603524.

42530666121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20131353225 + 22399312896 = 141885^2 + 149664^2 .

It is not a de Polignac number, because 42530666121 - 2¹⁷ = 42530535049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42530666021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3364326 + ... + 3376943.

It is an arithmetic number, because the mean of its divisors is an integer number (5126735835).

Almost surely, 2^42530666121 is an apocalyptic number.

It is an amenable number.

42530666121 is a deficient number, since it is larger than the sum of its proper divisors (18990163899).

42530666121 is a wasteful number, since it uses less digits than its factorization.

42530666121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6741976 (or 6741973 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 42530666121 in words is "forty-two billion, five hundred thirty million, six hundred sixty-six thousand, one hundred twenty-one".