1321101100 has 36 divisors (see below), whose sum is σ = 3127409208. Its totient is φ = 480400000.

The previous prime is 1321101091. The next prime is 1321101113. The reversal of 1321101100 is 11011231.

It is a Harshad number since it is a multiple of its sum of digits (10).

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, 599401 + ... + 601600.

It is an arithmetic number, because the mean of its divisors is an integer number (86872478).

Almost surely, 2^1321101100 is an apocalyptic number.

1321101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321101100 is an abundant number, since it is smaller than the sum of its proper divisors (1806308108).

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

1321101100 is a wasteful number, since it uses less digits than its factorization.

1321101100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201026 (or 1201019 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1321101100 is about 36346.9544803963. The cubic root of 1321101100 is about 1097.2662419010.

Adding to 1321101100 its reverse (11011231), we get a palindrome (1332112331).

The spelling of 1321101100 in words is "one billion, three hundred twenty-one million, one hundred one thousand, one hundred".