401321210240 has 64 divisors (see below), whose sum is σ = 1009903734000. Its totient is φ = 152079611904.

The previous prime is 401321210231. The next prime is 401321210261. The reversal of 401321210240 is 42012123104.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×401321210240² (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 7 ways as a sum of consecutive naturals, for example, 16489535 + ... + 16513854.

Almost surely, 2^401321210240 is an apocalyptic number.

401321210240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401321210240 is an abundant number, since it is smaller than the sum of its proper divisors (608582523760).

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

401321210240 is a wasteful number, since it uses less digits than its factorization.

401321210240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003427 (or 33003415 counting only the distinct ones).

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

Adding to 401321210240 its reverse (42012123104), we get a palindrome (443333333344).

The spelling of 401321210240 in words is "four hundred one billion, three hundred twenty-one million, two hundred ten thousand, two hundred forty".