12021210021999 has 16 divisors (see below), whose sum is σ = 16421799237984. Its totient is φ = 7817441971200.

The previous prime is 12021210021991. The next prime is 12021210022079. The reversal of 12021210021999 is 99912001212021.

It is a happy number.

It is not a de Polignac number, because 12021210021999 - 2³ = 12021210021991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021210021991) 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, 6910492 + ... + 8473329.

It is an arithmetic number, because the mean of its divisors is an integer number (1026362452374).

Almost surely, 2^{12021210021999} is an apocalyptic number.

12021210021999 is a deficient number, since it is larger than the sum of its proper divisors (4400589215985).

12021210021999 is a wasteful number, since it uses less digits than its factorization.

12021210021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390218.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 12021210021999 in words is "twelve trillion, twenty-one billion, two hundred ten million, twenty-one thousand, nine hundred ninety-nine".