11101910794209 has 15 divisors (see below), whose sum is σ = 16584380674147. Its totient is φ = 7401253871088.

The previous prime is 11101910794201. The next prime is 11101910794277. The reversal of 11101910794209 is 90249701910111.

The square root of 11101910794209 is 3331953.

It is a perfect power (a square), and thus also a powerful number.

11101910794209 is a `hidden beast` number, since 1 + 110 + 1 + 9 + 107 + 9 + 420 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 557135352225 + 10544775441984 = 746415^2 + 3247272^2 .

It is not a de Polignac number, because 11101910794209 - 2³ = 11101910794201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11101910794201) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 29802469 + ... + 30172685.

Almost surely, 2^{11101910794209} is an apocalyptic number.

11101910794209 is the 3331953-rd square number.

11101910794209 is the 1665977-th centered octagonal number.

It is an amenable number.

11101910794209 is a deficient number, since it is larger than the sum of its proper divisors (5482469879938).

11101910794209 is an frugal number, since it uses more digits than its factorization.

11101910794209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740446 (or 370220 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 45.

The spelling of 11101910794209 in words is "eleven trillion, one hundred one billion, nine hundred ten million, seven hundred ninety-four thousand, two hundred nine".