12002020031978 has 8 divisors (see below), whose sum is σ = 18012036072000. Its totient is φ = 5998008007980.

The previous prime is 12002020031977. The next prime is 12002020031993. The reversal of 12002020031978 is 87913002020021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12002020031977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500999008 + ... + 1501007003.

It is an arithmetic number, because the mean of its divisors is an integer number (2251504509000).

Almost surely, 2^{12002020031978} is an apocalyptic number.

12002020031978 is a deficient number, since it is larger than the sum of its proper divisors (6010016040022).

12002020031978 is a wasteful number, since it uses less digits than its factorization.

12002020031978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002008012.

The product of its (nonzero) digits is 12096, while the sum is 35.

Adding to 12002020031978 its reverse (87913002020021), we get a palindrome (99915022051999).

The spelling of 12002020031978 in words is "twelve trillion, two billion, twenty million, thirty-one thousand, nine hundred seventy-eight".