12021541878501 has 12 divisors (see below), whose sum is σ = 17428524842560. Its totient is φ = 7984787961960.

The previous prime is 12021541878497. The next prime is 12021541878553. The reversal of 12021541878501 is 10587814512021.

12021541878501 is a `hidden beast` number, since 1 + 2 + 0 + 21 + 5 + 41 + 87 + 8 + 501 = 666.

It is not a de Polignac number, because 12021541878501 - 2² = 12021541878497 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 (12021541878571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2464438291 + ... + 2464443168.

Almost surely, 2^{12021541878501} is an apocalyptic number.

It is an amenable number.

12021541878501 is a deficient number, since it is larger than the sum of its proper divisors (5406982964059).

12021541878501 is a wasteful number, since it uses less digits than its factorization.

12021541878501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928881736 (or 4928881733 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 45.

The spelling of 12021541878501 in words is "twelve trillion, twenty-one billion, five hundred forty-one million, eight hundred seventy-eight thousand, five hundred one".