12051021642 has 32 divisors (see below), whose sum is σ = 27839795904. Its totient is φ = 3437011200.

The previous prime is 12051021607. The next prime is 12051021667. The reversal of 12051021642 is 24612015021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5369209 + ... + 5371452.

It is an arithmetic number, because the mean of its divisors is an integer number (869993622).

Almost surely, 2^12051021642 is an apocalyptic number.

12051021642 is an abundant number, since it is smaller than the sum of its proper divisors (15788774262).

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

12051021642 is a wasteful number, since it uses less digits than its factorization.

12051021642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740694.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 12051021642 its reverse (24612015021), we get a palindrome (36663036663).

The spelling of 12051021642 in words is "twelve billion, fifty-one million, twenty-one thousand, six hundred forty-two".