12052171872 has 192 divisors, whose sum is σ = 38149816320. Its totient is φ = 3679603200.

The previous prime is 12052171853. The next prime is 12052171891. The reversal of 12052171872 is 27817125021.

12052171872 is a `hidden beast` number, since 120 + 521 + 7 + 1 + 8 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (12052171853) and next prime (12052171891).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1467297 + ... + 1475487.

It is an arithmetic number, because the mean of its divisors is an integer number (198696960).

Almost surely, 2^12052171872 is an apocalyptic number.

12052171872 is a gapful number since it is divisible by the number (12) 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 12052171872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19074908160).

12052171872 is an abundant number, since it is smaller than the sum of its proper divisors (26097644448).

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

12052171872 is a wasteful number, since it uses less digits than its factorization.

12052171872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8354 (or 8340 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

Adding to 12052171872 its reverse (27817125021), we get a palindrome (39869296893).

The spelling of 12052171872 in words is "twelve billion, fifty-two million, one hundred seventy-one thousand, eight hundred seventy-two".