1321100204 has 6 divisors (see below), whose sum is σ = 2311925364. Its totient is φ = 660550100.

The previous prime is 1321100201. The next prime is 1321100227. The reversal of 1321100204 is 4020011231.

It is not an unprimeable number, because it can be changed into a prime (1321100201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165137522 + ... + 165137529.

It is an arithmetic number, because the mean of its divisors is an integer number (385320894).

Almost surely, 2^1321100204 is an apocalyptic number.

It is an amenable number.

1321100204 is a deficient number, since it is larger than the sum of its proper divisors (990825160).

1321100204 is a wasteful number, since it uses less digits than its factorization.

1321100204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330275055 (or 330275053 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1321100204 is about 36346.9421547398. The cubic root of 1321100204 is about 1097.2659938375.

Adding to 1321100204 its reverse (4020011231), we get a palindrome (5341111435).

The spelling of 1321100204 in words is "one billion, three hundred twenty-one million, one hundred thousand, two hundred four".