42121320000 has 140 divisors (see below), whose sum is σ = 139263308976. Its totient is φ = 11232320000.

The previous prime is 42121319971. The next prime is 42121320041. The reversal of 42121320000 is 2312124.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 55506 + ... + 295505.

Almost surely, 2^42121320000 is an apocalyptic number.

42121320000 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 42121320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69631654488).

42121320000 is an abundant number, since it is smaller than the sum of its proper divisors (97141988976).

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

42121320000 is an equidigital number, since it uses as much as digits as its factorization.

42121320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351046 (or 351021 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 42121320000 its reverse (2312124), we get a palindrome (42123632124).

The spelling of 42121320000 in words is "forty-two billion, one hundred twenty-one million, three hundred twenty thousand".