12061660012500 has 288 divisors, whose sum is σ = 42567855982848. Its totient is φ = 2594776320000.

The previous prime is 12061660012471. The next prime is 12061660012537. The reversal of 12061660012500 is 521006616021.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3111054 + ... + 5813946.

It is an arithmetic number, because the mean of its divisors is an integer number (147805055496).

Almost surely, 2^{12061660012500} is an apocalyptic number.

12061660012500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12061660012500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21283927991424).

12061660012500 is an abundant number, since it is smaller than the sum of its proper divisors (30506195970348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12061660012500 is a wasteful number, since it uses less digits than its factorization.

12061660012500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2702949 (or 2702927 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 12061660012500 its reverse (521006616021), we get a palindrome (12582666628521).

The spelling of 12061660012500 in words is "twelve trillion, sixty-one billion, six hundred sixty million, twelve thousand, five hundred".