12021100009979 has 8 divisors (see below), whose sum is σ = 12849701814432. Its totient is φ = 11217993645760.

The previous prime is 12021100009973. The next prime is 12021100010027. The reversal of 12021100009979 is 97990000112021.

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

It is a cyclic number.

It is not a de Polignac number, because 12021100009979 - 2¹² = 12021100005883 is a prime.

It is a super-2 number, since 2×12021100009979² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (12021100009973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6373859084 + ... + 6373860969.

It is an arithmetic number, because the mean of its divisors is an integer number (1606212726804).

Almost surely, 2^{12021100009979} is an apocalyptic number.

12021100009979 is a deficient number, since it is larger than the sum of its proper divisors (828601804453).

12021100009979 is a wasteful number, since it uses less digits than its factorization.

12021100009979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12747720117.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 12021100009979 in words is "twelve trillion, twenty-one billion, one hundred million, nine thousand, nine hundred seventy-nine".