401504121200 has 240 divisors, whose sum is σ = 1188722250240. Its totient is φ = 126908328960.

The previous prime is 401504121191. The next prime is 401504121241. The reversal of 401504121200 is 2121405104.

It is a happy number.

It is a super-2 number, since 2×401504121200² (a number of 24 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30533027 + ... + 30546173.

It is an arithmetic number, because the mean of its divisors is an integer number (4953009376).

Almost surely, 2^401504121200 is an apocalyptic number.

401504121200 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 401504121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594361125120).

401504121200 is an abundant number, since it is smaller than the sum of its proper divisors (787218129040).

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

401504121200 is a wasteful number, since it uses less digits than its factorization.

401504121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14024 (or 14013 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 401504121200 its reverse (2121405104), we get a palindrome (403625526304).

The spelling of 401504121200 in words is "four hundred one billion, five hundred four million, one hundred twenty-one thousand, two hundred".