321120320460 has 96 divisors (see below), whose sum is σ = 925148263872. Its totient is φ = 83163386880.

The previous prime is 321120320459. The next prime is 321120320461. The reversal of 321120320460 is 64023021123.

It is an interprime number because it is at equal distance from previous prime (321120320459) and next prime (321120320461).

It is a super-2 number, since 2×321120320460² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321120320460.

It is not an unprimeable number, because it can be changed into a prime (321120320461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1067334 + ... + 1334706.

It is an arithmetic number, because the mean of its divisors is an integer number (9636961082).

Almost surely, 2^321120320460 is an apocalyptic number.

321120320460 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 321120320460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462574131936).

321120320460 is an abundant number, since it is smaller than the sum of its proper divisors (604027943412).

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

321120320460 is a wasteful number, since it uses less digits than its factorization.

321120320460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267963 (or 267961 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 321120320460 its reverse (64023021123), we get a palindrome (385143341583).

The spelling of 321120320460 in words is "three hundred twenty-one billion, one hundred twenty million, three hundred twenty thousand, four hundred sixty".