12121123012999 has 16 divisors (see below), whose sum is σ = 16274514816000. Its totient is φ = 8718490078560.

The previous prime is 12121123012981. The next prime is 12121123013119. The reversal of 12121123012999 is 99921032112121.

It is a cyclic number.

It is not a de Polignac number, because 12121123012999 - 2¹¹ = 12121123010951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121123012939) 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, 6054505999 + ... + 6054508000.

It is an arithmetic number, because the mean of its divisors is an integer number (1017157176000).

Almost surely, 2^{12121123012999} is an apocalyptic number.

12121123012999 is a deficient number, since it is larger than the sum of its proper divisors (4153391803001).

12121123012999 is a wasteful number, since it uses less digits than its factorization.

12121123012999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12109014030.

The product of its (nonzero) digits is 34992, while the sum is 43.

The spelling of 12121123012999 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-three million, twelve thousand, nine hundred ninety-nine".