12120542661 has 8 divisors (see below), whose sum is σ = 16165250784. Its totient is φ = 8078098160.

The previous prime is 12120542641. The next prime is 12120542669. The reversal of 12120542661 is 16624502121.

12120542661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12120542661 - 2¹⁰ = 12120541637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120542669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553371 + ... + 574856.

It is an arithmetic number, because the mean of its divisors is an integer number (2020656348).

Almost surely, 2^12120542661 is an apocalyptic number.

It is an amenable number.

12120542661 is a deficient number, since it is larger than the sum of its proper divisors (4044708123).

12120542661 is a wasteful number, since it uses less digits than its factorization.

12120542661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131811.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 12120542661 in words is "twelve billion, one hundred twenty million, five hundred forty-two thousand, six hundred sixty-one".