42041221400 has 24 divisors (see below), whose sum is σ = 97745840220. Its totient is φ = 16816488480.

The previous prime is 42041221379. The next prime is 42041221403. The reversal of 42041221400 is 412214024.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42041221403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105102854 + ... + 105103253.

Almost surely, 2^42041221400 is an apocalyptic number.

42041221400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42041221400 is an abundant number, since it is smaller than the sum of its proper divisors (55704618820).

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

42041221400 is a wasteful number, since it uses less digits than its factorization.

42041221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210206123 (or 210206114 counting only the distinct ones).

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

Adding to 42041221400 its reverse (412214024), we get a palindrome (42453435424).

The spelling of 42041221400 in words is "forty-two billion, forty-one million, two hundred twenty-one thousand, four hundred".