42021122240 has 112 divisors (see below), whose sum is σ = 106724086272. Its totient is φ = 15703965696.

The previous prime is 42021122219. The next prime is 42021122309. The reversal of 42021122240 is 4222112024.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717089 + ... + 773471.

Almost surely, 2^42021122240 is an apocalyptic number.

42021122240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42021122240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53362043136).

42021122240 is an abundant number, since it is smaller than the sum of its proper divisors (64702964032).

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

42021122240 is a wasteful number, since it uses less digits than its factorization.

42021122240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56554 (or 56544 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 42021122240 its reverse (4222112024), we get a palindrome (46243234264).

The spelling of 42021122240 in words is "forty-two billion, twenty-one million, one hundred twenty-two thousand, two hundred forty".