42420146122 has 4 divisors (see below), whose sum is σ = 63630219186. Its totient is φ = 21210073060.

The previous prime is 42420146107. The next prime is 42420146123. The reversal of 42420146122 is 22164102424.

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., 39525813721 + 2894332401 = 198811^2 + 53799^2 .

It is not an unprimeable number, because it can be changed into a prime (42420146123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605036529 + ... + 10605036532.

Almost surely, 2^42420146122 is an apocalyptic number.

42420146122 is a deficient number, since it is larger than the sum of its proper divisors (21210073064).

42420146122 is a wasteful number, since it uses less digits than its factorization.

42420146122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21210073063.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 42420146122 its reverse (22164102424), we get a palindrome (64584248546).

The spelling of 42420146122 in words is "forty-two billion, four hundred twenty million, one hundred forty-six thousand, one hundred twenty-two".