1321800700 has 36 divisors (see below), whose sum is σ = 3129065352. Its totient is φ = 480654400.

The previous prime is 1321800679. The next prime is 1321800719. The reversal of 1321800700 is 70081231.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 599719 + ... + 601918.

It is an arithmetic number, because the mean of its divisors is an integer number (86918482).

Almost surely, 2^1321800700 is an apocalyptic number.

1321800700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321800700 is an abundant number, since it is smaller than the sum of its proper divisors (1807264652).

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

1321800700 is a wasteful number, since it uses less digits than its factorization.

1321800700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201662 (or 1201655 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1321800700 is about 36356.5771216158. The cubic root of 1321800700 is about 1097.4598965219.

Adding to 1321800700 its reverse (70081231), we get a palindrome (1391881931).

It can be divided in two parts, 1321800 and 700, that added together give a square (1322500 = 1150²).

The spelling of 1321800700 in words is "one billion, three hundred twenty-one million, eight hundred thousand, seven hundred".