12001211209997 has 16 divisors (see below), whose sum is σ = 13398208590720. Its totient is φ = 10696956811200.

The previous prime is 12001211209987. The next prime is 12001211210041. The reversal of 12001211209997 is 79990211210021.

It is a cyclic number.

It is not a de Polignac number, because 12001211209997 - 2¹⁸ = 12001210947853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001211209907) 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, 225077654 + ... + 225130967.

It is an arithmetic number, because the mean of its divisors is an integer number (837388036920).

Almost surely, 2^{12001211209997} is an apocalyptic number.

It is an amenable number.

12001211209997 is a deficient number, since it is larger than the sum of its proper divisors (1396997380723).

12001211209997 is a wasteful number, since it uses less digits than its factorization.

12001211209997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450208724.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 12001211209997 in words is "twelve trillion, one billion, two hundred eleven million, two hundred nine thousand, nine hundred ninety-seven".