12001211999967 has 16 divisors (see below), whose sum is σ = 16124479418880. Its totient is φ = 7939420228032.

The previous prime is 12001211999963. The next prime is 12001211999983. The reversal of 12001211999967 is 76999911210021.

It is not a de Polignac number, because 12001211999967 - 2² = 12001211999963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001211999963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4397943 + ... + 6583640.

It is an arithmetic number, because the mean of its divisors is an integer number (1007779963680).

Almost surely, 2^{12001211999967} is an apocalyptic number.

12001211999967 is a deficient number, since it is larger than the sum of its proper divisors (4123267418913).

12001211999967 is a wasteful number, since it uses less digits than its factorization.

12001211999967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10984382.

The product of its (nonzero) digits is 1102248, while the sum is 57.

The spelling of 12001211999967 in words is "twelve trillion, one billion, two hundred eleven million, nine hundred ninety-nine thousand, nine hundred sixty-seven".