11001209890 has 24 divisors (see below), whose sum is σ = 21766032540. Its totient is φ = 4000439520.

The previous prime is 11001209887. The next prime is 11001209917. The reversal of 11001209890 is 9890210011.

It can be written as a sum of positive squares in 2 ways, for example, as 10894975641 + 106234249 = 104379^2 + 10307^2 .

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, 4544745 + ... + 4547164.

Almost surely, 2^11001209890 is an apocalyptic number.

11001209890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11001209890 is a deficient number, since it is larger than the sum of its proper divisors (10764822650).

11001209890 is a wasteful number, since it uses less digits than its factorization.

11001209890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9091938 (or 9091927 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 11001209890 in words is "eleven billion, one million, two hundred nine thousand, eight hundred ninety".