12051011142 has 64 divisors (see below), whose sum is σ = 27109494720. Its totient is φ = 3967776000.

The previous prime is 12051011131. The next prime is 12051011179. The reversal of 12051011142 is 24111015021.

12051011142 is a `hidden beast` number, since 1 + 2 + 0 + 510 + 11 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2511898 + ... + 2516690.

It is an arithmetic number, because the mean of its divisors is an integer number (423585855).

Almost surely, 2^12051011142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12051011142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13554747360).

12051011142 is an abundant number, since it is smaller than the sum of its proper divisors (15058483578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12051011142 is a wasteful number, since it uses less digits than its factorization.

12051011142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366 (or 5360 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12051011142 its reverse (24111015021), we get a palindrome (36162026163).

The spelling of 12051011142 in words is "twelve billion, fifty-one million, eleven thousand, one hundred forty-two".