42021434120 has 16 divisors (see below), whose sum is σ = 94548226860. Its totient is φ = 16808573632.

The previous prime is 42021434111. The next prime is 42021434129. The reversal of 42021434120 is 2143412024.

It is an interprime number because it is at equal distance from previous prime (42021434111) and next prime (42021434129).

It can be written as a sum of positive squares in 2 ways, for example, as 37331649796 + 4689784324 = 193214^2 + 68482^2 .

It is not an unprimeable number, because it can be changed into a prime (42021434129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525267887 + ... + 525267966.

Almost surely, 2^42021434120 is an apocalyptic number.

42021434120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42021434120 is an abundant number, since it is smaller than the sum of its proper divisors (52526792740).

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

42021434120 is a wasteful number, since it uses less digits than its factorization.

42021434120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050535864 (or 1050535860 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42021434120 its reverse (2143412024), we get a palindrome (44164846144).

The spelling of 42021434120 in words is "forty-two billion, twenty-one million, four hundred thirty-four thousand, one hundred twenty".