11899077121 has 4 divisors (see below), whose sum is σ = 12599022852. Its totient is φ = 11199131392.

The previous prime is 11899077119. The next prime is 11899077133. The reversal of 11899077121 is 12177099811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12177099811 = 21139 ⋅576049.

It can be written as a sum of positive squares in 2 ways, for example, as 8571056400 + 3328020721 = 92580^2 + 57689^2 .

It is a cyclic number.

It is not a de Polignac number, because 11899077121 - 2¹ = 11899077119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11899077181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349972840 + ... + 349972873.

It is an arithmetic number, because the mean of its divisors is an integer number (3149755713).

Almost surely, 2^11899077121 is an apocalyptic number.

It is an amenable number.

11899077121 is a deficient number, since it is larger than the sum of its proper divisors (699945731).

11899077121 is an equidigital number, since it uses as much as digits as its factorization.

11899077121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699945730.

The product of its (nonzero) digits is 63504, while the sum is 46.

The spelling of 11899077121 in words is "eleven billion, eight hundred ninety-nine million, seventy-seven thousand, one hundred twenty-one".