421120011400 has 144 divisors (see below), whose sum is σ = 1078643975760. Its totient is φ = 151639401600.

The previous prime is 421120011317. The next prime is 421120011401. The reversal of 421120011400 is 4110021124.

It is a happy number.

It is a super-2 number, since 2×421120011400² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (421120011401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 23330779 + ... + 23348821.

It is an arithmetic number, because the mean of its divisors is an integer number (7490583165).

Almost surely, 2^421120011400 is an apocalyptic number.

421120011400 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 421120011400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539321987880).

421120011400 is an abundant number, since it is smaller than the sum of its proper divisors (657523964360).

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

421120011400 is a wasteful number, since it uses less digits than its factorization.

421120011400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18276 (or 18164 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 421120011400 its reverse (4110021124), we get a palindrome (425230032524).

The spelling of 421120011400 in words is "four hundred twenty-one billion, one hundred twenty million, eleven thousand, four hundred".