1001000001099 has 48 divisors (see below), whose sum is σ = 1590129142272. Its totient is φ = 558187261632.

The previous prime is 1001000001073. The next prime is 1001000001107. The reversal of 1001000001099 is 9901000001001.

It is not a de Polignac number, because 1001000001099 - 2⁷ = 1001000000971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1001000001059) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6900277 + ... + 7043849.

It is an arithmetic number, because the mean of its divisors is an integer number (33127690464).

Almost surely, 2^{1001000001099} is an apocalyptic number.

1001000001099 is a deficient number, since it is larger than the sum of its proper divisors (589129141173).

1001000001099 is a wasteful number, since it uses less digits than its factorization.

1001000001099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144736 (or 144729 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 21.

The spelling of 1001000001099 in words is "one trillion, one billion, one thousand, ninety-nine".