1320121200 has 60 divisors (see below), whose sum is σ = 4228792088. Its totient is φ = 352032000.

The previous prime is 1320121193. The next prime is 1320121211. The reversal of 1320121200 is 21210231.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 548851 + ... + 551250.

Almost surely, 2^1320121200 is an apocalyptic number.

1320121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320121200 is an abundant number, since it is smaller than the sum of its proper divisors (2908670888).

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

1320121200 is a wasteful number, since it uses less digits than its factorization.

1320121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100122 (or 1100111 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1320121200 is about 36333.4721709886. The cubic root of 1320121200 is about 1096.9948831234.

Adding to 1320121200 its reverse (21210231), we get a palindrome (1341331431).

The spelling of 1320121200 in words is "one billion, three hundred twenty million, one hundred twenty-one thousand, two hundred".