42102420042 has 32 divisors (see below), whose sum is σ = 87027056640. Its totient is φ = 13564874160.

The previous prime is 42102419981. The next prime is 42102420047. The reversal of 42102420042 is 24002420124.

It is a super-2 number, since 2×42102420042² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42102420047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15559 + ... + 290597.

It is an arithmetic number, because the mean of its divisors is an integer number (2719595520).

Almost surely, 2^42102420042 is an apocalyptic number.

42102420042 is an abundant number, since it is smaller than the sum of its proper divisors (44924636598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42102420042 is a wasteful number, since it uses less digits than its factorization.

42102420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275898.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 42102420042 its reverse (24002420124), we get a palindrome (66104840166).

The spelling of 42102420042 in words is "forty-two billion, one hundred two million, four hundred twenty thousand, forty-two".