12051999083520 has 2112 divisors, whose sum is σ = 50156930543616. Its totient is φ = 2642317148160.

The previous prime is 12051999083429. The next prime is 12051999083543. The reversal of 12051999083520 is 2538099915021.

It is a happy number.

12051999083520 is a `hidden beast` number, since 1 + 2 + 0 + 519 + 9 + 90 + 8 + 35 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2112).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 32839234377 + ... + 32839234743.

Almost surely, 2^{12051999083520} is an apocalyptic number.

12051999083520 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 12051999083520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25078465271808).

12051999083520 is an abundant number, since it is smaller than the sum of its proper divisors (38104931460096).

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

12051999083520 is a wasteful number, since it uses less digits than its factorization.

12051999083520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 545 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 12051999083520 in words is "twelve trillion, fifty-one billion, nine hundred ninety-nine million, eighty-three thousand, five hundred twenty".