12021800055541 has 8 divisors (see below), whose sum is σ = 12317122589184. Its totient is φ = 11726577898080.

The previous prime is 12021800055523. The next prime is 12021800055571. The reversal of 12021800055541 is 14555000812021.

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 12021800055541 - 2⁹ = 12021800055029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021800055497 and 12021800055506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021800055571) 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, 24851541 + ... + 25330666.

It is an arithmetic number, because the mean of its divisors is an integer number (1539640323648).

Almost surely, 2^{12021800055541} is an apocalyptic number.

It is an amenable number.

12021800055541 is a deficient number, since it is larger than the sum of its proper divisors (295322533643).

12021800055541 is an equidigital number, since it uses as much as digits as its factorization.

12021800055541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50188091.

The product of its (nonzero) digits is 16000, while the sum is 34.

Adding to 12021800055541 its reverse (14555000812021), we get a palindrome (26576800867562).

The spelling of 12021800055541 in words is "twelve trillion, twenty-one billion, eight hundred million, fifty-five thousand, five hundred forty-one".