42111032420 has 12 divisors (see below), whose sum is σ = 88433168124. Its totient is φ = 16844412960.

The previous prime is 42111032329. The next prime is 42111032477. The reversal of 42111032420 is 2423011124.

It can be written as a sum of positive squares in 2 ways, for example, as 24256193536 + 17854838884 = 155744^2 + 133622^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2105551621 = 42111032420 / (4 + 2 + 1 + 1 + 1 + 0 + 3 + 2 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 42111032392 and 42111032401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1052775791 + ... + 1052775830.

It is an arithmetic number, because the mean of its divisors is an integer number (7369430677).

Almost surely, 2^42111032420 is an apocalyptic number.

It is an amenable number.

42111032420 is an abundant number, since it is smaller than the sum of its proper divisors (46322135704).

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

42111032420 is a wasteful number, since it uses less digits than its factorization.

42111032420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105551630 (or 2105551628 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 42111032420 its reverse (2423011124), we get a palindrome (44534043544).

The spelling of 42111032420 in words is "forty-two billion, one hundred eleven million, thirty-two thousand, four hundred twenty".