36123321121 has 4 divisors (see below), whose sum is σ = 36344936752. Its totient is φ = 35901705492.

The previous prime is 36123321107. The next prime is 36123321137. The reversal of 36123321121 is 12112332163.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36123321121 - 2⁵ = 36123321089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36123321161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110807571 + ... + 110807896.

It is an arithmetic number, because the mean of its divisors is an integer number (9086234188).

Almost surely, 2^36123321121 is an apocalyptic number.

It is an amenable number.

36123321121 is a deficient number, since it is larger than the sum of its proper divisors (221615631).

36123321121 is a wasteful number, since it uses less digits than its factorization.

36123321121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221615630.

The product of its digits is 1296, while the sum is 25.

Adding to 36123321121 its reverse (12112332163), we get a palindrome (48235653284).

The spelling of 36123321121 in words is "thirty-six billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred twenty-one".