1099012100 has 18 divisors (see below), whose sum is σ = 2384856474. Its totient is φ = 439604800.

The previous prime is 1099012099. The next prime is 1099012127. The reversal of 1099012100 is 12109901.

It can be written as a sum of positive squares in 3 ways, for example, as 104366656 + 994645444 = 10216^2 + 31538^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5494961 + ... + 5495160.

Almost surely, 2^1099012100 is an apocalyptic number.

1099012100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1099012100 is an abundant number, since it is smaller than the sum of its proper divisors (1285844374).

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

1099012100 is a wasteful number, since it uses less digits than its factorization.

1099012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990135 (or 10990128 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1099012100 is about 33151.3514053349. The cubic root of 1099012100 is about 1031.9709957696.

The spelling of 1099012100 in words is "one billion, ninety-nine million, twelve thousand, one hundred".