12127515620 has 48 divisors (see below), whose sum is σ = 27867139776. Its totient is φ = 4396656000.

The previous prime is 12127515613. The next prime is 12127515637. The reversal of 12127515620 is 2651572121.

It is a super-2 number, since 2×12127515620² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10451 + ... + 156090.

It is an arithmetic number, because the mean of its divisors is an integer number (580565412).

Almost surely, 2^12127515620 is an apocalyptic number.

12127515620 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 12127515620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13933569888).

12127515620 is an abundant number, since it is smaller than the sum of its proper divisors (15739624156).

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

12127515620 is a wasteful number, since it uses less digits than its factorization.

12127515620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166892 (or 166890 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The spelling of 12127515620 in words is "twelve billion, one hundred twenty-seven million, five hundred fifteen thousand, six hundred twenty".