42121231040 has 84 divisors (see below), whose sum is σ = 116676927936. Its totient is φ = 14441559552.

The previous prime is 42121231039. The next prime is 42121231093. The reversal of 42121231040 is 4013212124.

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 11 ways as a sum of consecutive naturals, for example, 1327472 + ... + 1358831.

Almost surely, 2^42121231040 is an apocalyptic number.

42121231040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42121231040 is an abundant number, since it is smaller than the sum of its proper divisors (74555696896).

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

42121231040 is a wasteful number, since it uses less digits than its factorization.

42121231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686334 (or 2686317 counting only the distinct ones).

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

Adding to 42121231040 its reverse (4013212124), we get a palindrome (46134443164).

The spelling of 42121231040 in words is "forty-two billion, one hundred twenty-one million, two hundred thirty-one thousand, forty".