42140342122 has 4 divisors (see below), whose sum is σ = 63210513186. Its totient is φ = 21070171060.

The previous prime is 42140342107. The next prime is 42140342129. The reversal of 42140342122 is 22124304124.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 41942630401 + 197711721 = 204799^2 + 14061^2 .

It is not an unprimeable number, because it can be changed into a prime (42140342129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10535085529 + ... + 10535085532.

Almost surely, 2^42140342122 is an apocalyptic number.

42140342122 is a deficient number, since it is larger than the sum of its proper divisors (21070171064).

42140342122 is a wasteful number, since it uses less digits than its factorization.

42140342122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21070171063.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 42140342122 its reverse (22124304124), we get a palindrome (64264646246).

The spelling of 42140342122 in words is "forty-two billion, one hundred forty million, three hundred forty-two thousand, one hundred twenty-two".