321118126440 has 128 divisors (see below), whose sum is σ = 996075601920. Its totient is φ = 82732089600.

The previous prime is 321118126429. The next prime is 321118126481. The reversal of 321118126440 is 44621811123.

It is a super-2 number, since 2×321118126440² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2186935 + ... + 2329145.

It is an arithmetic number, because the mean of its divisors is an integer number (7781840640).

Almost surely, 2^321118126440 is an apocalyptic number.

321118126440 is a gapful number since it is divisible by the number (30) 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 321118126440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498037800960).

321118126440 is an abundant number, since it is smaller than the sum of its proper divisors (674957475480).

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

321118126440 is a wasteful number, since it uses less digits than its factorization.

321118126440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142863 (or 142859 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

Adding to 321118126440 its reverse (44621811123), we get a palindrome (365739937563).

The spelling of 321118126440 in words is "three hundred twenty-one billion, one hundred eighteen million, one hundred twenty-six thousand, four hundred forty".