1211099585 has 16 divisors (see below), whose sum is σ = 1478993472. Its totient is φ = 951912000.

The previous prime is 1211099579. The next prime is 1211099597. The reversal of 1211099585 is 5859901121.

It is not a de Polignac number, because 1211099585 - 2⁶ = 1211099521 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57002 + ... + 75308.

It is an arithmetic number, because the mean of its divisors is an integer number (92437092).

Almost surely, 2^1211099585 is an apocalyptic number.

It is an amenable number.

1211099585 is a deficient number, since it is larger than the sum of its proper divisors (267893887).

1211099585 is a wasteful number, since it uses less digits than its factorization.

1211099585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18544.

The product of its (nonzero) digits is 32400, while the sum is 41.

The square root of 1211099585 is about 34800.8560957917. The cubic root of 1211099585 is about 1065.9249269820.

The spelling of 1211099585 in words is "one billion, two hundred eleven million, ninety-nine thousand, five hundred eighty-five".