321245122440 has 128 divisors (see below), whose sum is σ = 1067039723520. Its totient is φ = 76715232000.

The previous prime is 321245122439. The next prime is 321245122469. The reversal of 321245122440 is 44221542123.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 321245122398 and 321245122407.

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, 1727736 + ... + 1904615.

It is an arithmetic number, because the mean of its divisors is an integer number (8336247840).

Almost surely, 2^321245122440 is an apocalyptic number.

321245122440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321245122440 is an abundant number, since it is smaller than the sum of its proper divisors (745794601080).

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

321245122440 is a wasteful number, since it uses less digits than its factorization.

321245122440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632443 (or 3632439 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 321245122440 its reverse (44221542123), we get a palindrome (365466664563).

The spelling of 321245122440 in words is "three hundred twenty-one billion, two hundred forty-five million, one hundred twenty-two thousand, four hundred forty".