1211104091 has 16 divisors (see below), whose sum is σ = 1265400000. Its totient is φ = 1158064128.

The previous prime is 1211104067. The next prime is 1211104093. The reversal of 1211104091 is 1904011121.

It is a cyclic number.

It is not a de Polignac number, because 1211104091 - 2²⁶ = 1143995227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211104093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969035 + ... + 970283.

It is an arithmetic number, because the mean of its divisors is an integer number (79087500).

Almost surely, 2^1211104091 is an apocalyptic number.

1211104091 is a deficient number, since it is larger than the sum of its proper divisors (54295909).

1211104091 is a wasteful number, since it uses less digits than its factorization.

1211104091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1211104091 is about 34800.9208355181. The cubic root of 1211104091 is about 1065.9262489354.

The spelling of 1211104091 in words is "one billion, two hundred eleven million, one hundred four thousand, ninety-one".