1321200264120 has 64 divisors (see below), whose sum is σ = 4323928141440. Its totient is φ = 320290972800.

The previous prime is 1321200264119. The next prime is 1321200264157. The reversal of 1321200264120 is 214620021231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500453326 + ... + 500455965.

It is an arithmetic number, because the mean of its divisors is an integer number (67561377210).

Almost surely, 2^{1321200264120} is an apocalyptic number.

1321200264120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321200264120 is an abundant number, since it is smaller than the sum of its proper divisors (3002727877320).

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

1321200264120 is a wasteful number, since it uses less digits than its factorization.

1321200264120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000909316 (or 1000909312 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1321200264120 its reverse (214620021231), we get a palindrome (1535820285351).

The spelling of 1321200264120 in words is "one trillion, three hundred twenty-one billion, two hundred million, two hundred sixty-four thousand, one hundred twenty".