1213101100 has 36 divisors (see below), whose sum is σ = 2682109584. Its totient is φ = 476082880.

The previous prime is 1213101053. The next prime is 1213101103. The reversal of 1213101100 is 11013121.

It is a super-2 number, since 2×1213101100² = 2943228557642420000, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (1213101103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109144 + ... + 119743.

It is an arithmetic number, because the mean of its divisors is an integer number (74503044).

Almost surely, 2^1213101100 is an apocalyptic number.

1213101100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213101100 is an abundant number, since it is smaller than the sum of its proper divisors (1469008484).

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

1213101100 is a wasteful number, since it uses less digits than its factorization.

1213101100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228954 (or 228947 counting only the distinct ones).

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

The square root of 1213101100 is about 34829.6009164618. The cubic root of 1213101100 is about 1066.5118015186.

Adding to 1213101100 its reverse (11013121), we get a palindrome (1224114221).

The spelling of 1213101100 in words is "one billion, two hundred thirteen million, one hundred one thousand, one hundred".