12020450135 has 4 divisors (see below), whose sum is σ = 14424540168. Its totient is φ = 9616360104.

The previous prime is 12020450107. The next prime is 12020450161. The reversal of 12020450135 is 53105402021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12020450135 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12020450135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202045009 + ... + 1202045018.

It is an arithmetic number, because the mean of its divisors is an integer number (3606135042).

Almost surely, 2^12020450135 is an apocalyptic number.

12020450135 is a deficient number, since it is larger than the sum of its proper divisors (2404090033).

12020450135 is an equidigital number, since it uses as much as digits as its factorization.

12020450135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404090032.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 12020450135 its reverse (53105402021), we get a palindrome (65125852156).

The spelling of 12020450135 in words is "twelve billion, twenty million, four hundred fifty thousand, one hundred thirty-five".