2131321200 has 120 divisors (see below), whose sum is σ = 7186742400. Its totient is φ = 538433280.

The previous prime is 2131321183. The next prime is 2131321201. The reversal of 2131321200 is 21231312.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2131321200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131321201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23940 + ... + 69539.

It is an arithmetic number, because the mean of its divisors is an integer number (59889520).

Almost surely, 2^2131321200 is an apocalyptic number.

2131321200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131321200 is an abundant number, since it is smaller than the sum of its proper divisors (5055421200).

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

2131321200 is a wasteful number, since it uses less digits than its factorization.

2131321200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93519 (or 93508 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2131321200 is about 46166.2344143423. The cubic root of 2131321200 is about 1286.9143243765.

Adding to 2131321200 its reverse (21231312), we get a palindrome (2152552512).

The spelling of 2131321200 in words is "two billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred".