12021134042 has 16 divisors (see below), whose sum is σ = 18238537152. Its totient is φ = 5941971360.

The previous prime is 12021134039. The next prime is 12021134053. The reversal of 12021134042 is 24043112021.

It is a super-3 number, since 3×12021134042³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18323 + ... + 156134.

It is an arithmetic number, because the mean of its divisors is an integer number (1139908572).

Almost surely, 2^12021134042 is an apocalyptic number.

12021134042 is a deficient number, since it is larger than the sum of its proper divisors (6217403110).

12021134042 is a wasteful number, since it uses less digits than its factorization.

12021134042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174853.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12021134042 its reverse (24043112021), we get a palindrome (36064246063).

The spelling of 12021134042 in words is "twelve billion, twenty-one million, one hundred thirty-four thousand, forty-two".