42420220200242 has 4 divisors (see below), whose sum is σ = 63630330300366. Its totient is φ = 21210110100120.

The previous prime is 42420220200209. The next prime is 42420220200307. The reversal of 42420220200242 is 24200202202424.

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., 39473714061721 + 2946506138521 = 6282811^2 + 1716539^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605055050059 + ... + 10605055050062.

Almost surely, 2^{42420220200242} is an apocalyptic number.

42420220200242 is a deficient number, since it is larger than the sum of its proper divisors (21210110100124).

42420220200242 is a wasteful number, since it uses less digits than its factorization.

42420220200242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21210110100123.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 42420220200242 its reverse (24200202202424), we get a palindrome (66620422402666).

The spelling of 42420220200242 in words is "forty-two trillion, four hundred twenty billion, two hundred twenty million, two hundred thousand, two hundred forty-two".