36111421 has 4 divisors (see below), whose sum is σ = 36606172. Its totient is φ = 35616672.

The previous prime is 36111407. The next prime is 36111433. The reversal of 36111421 is 12411163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12411163 = 1277 ⋅9719.

It can be written as a sum of positive squares in 2 ways, for example, as 22934521 + 13176900 = 4789^2 + 3630^2 .

It is a cyclic number.

It is not a de Polignac number, because 36111421 - 2⁹ = 36110909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36111401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247266 + ... + 247411.

It is an arithmetic number, because the mean of its divisors is an integer number (9151543).

Almost surely, 2^36111421 is an apocalyptic number.

It is an amenable number.

36111421 is a deficient number, since it is larger than the sum of its proper divisors (494751).

36111421 is an equidigital number, since it uses as much as digits as its factorization.

36111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494750.

The product of its digits is 144, while the sum is 19.

The square root of 36111421 is about 6009.2779100321. The cubic root of 36111421 is about 330.5330259353.

Adding to 36111421 its reverse (12411163), we get a palindrome (48522584).

The spelling of 36111421 in words is "thirty-six million, one hundred eleven thousand, four hundred twenty-one".