1321100210 has 32 divisors (see below), whose sum is σ = 2533325760. Its totient is φ = 494589888.

The previous prime is 1321100201. The next prime is 1321100227. The reversal of 1321100210 is 120011231.

It is a junction number, because it is equal to n+sod(n) for n = 1321100191 and 1321100200.

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, 26117 + ... + 57656.

It is an arithmetic number, because the mean of its divisors is an integer number (79166430).

Almost surely, 2^1321100210 is an apocalyptic number.

1321100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321100210 is a deficient number, since it is larger than the sum of its proper divisors (1212225550).

1321100210 is a wasteful number, since it uses less digits than its factorization.

1321100210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83882.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1321100210 is about 36346.9422372777. The cubic root of 1321100210 is about 1097.2659954986.

Adding to 1321100210 its reverse (120011231), we get a palindrome (1441111441).

The spelling of 1321100210 in words is "one billion, three hundred twenty-one million, one hundred thousand, two hundred ten".