12000011999972 has 24 divisors (see below), whose sum is σ = 21314061146784. Its totient is φ = 5910285344832.

The previous prime is 12000011999929. The next prime is 12000011999977. The reversal of 12000011999972 is 27999911000021.

It is a self number, because there is not a number n which added to its sum of digits gives 12000011999972.

It is not an unprimeable number, because it can be changed into a prime (12000011999977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9065183 + ... + 10304249.

It is an arithmetic number, because the mean of its divisors is an integer number (888085881116).

Almost surely, 2^{12000011999972} is an apocalyptic number.

It is an amenable number.

12000011999972 is a deficient number, since it is larger than the sum of its proper divisors (9314049146812).

12000011999972 is a wasteful number, since it uses less digits than its factorization.

12000011999972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275275 (or 1275273 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 50.

Adding to 12000011999972 its reverse (27999911000021), we get a palindrome (39999922999993).

The spelling of 12000011999972 in words is "twelve trillion, eleven million, nine hundred ninety-nine thousand, nine hundred seventy-two".