12001551343530 has 128 divisors (see below), whose sum is σ = 33093840453120. Its totient is φ = 2728637829120.

The previous prime is 12001551343511. The next prime is 12001551343541. The reversal of 12001551343530 is 3534315510021.

It is a junction number, because it is equal to n+sod(n) for n = 12001551343491 and 12001551343500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33397972 + ... + 33755408.

It is an arithmetic number, because the mean of its divisors is an integer number (258545628540).

Almost surely, 2^{12001551343530} is an apocalyptic number.

12001551343530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12001551343530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16546920226560).

12001551343530 is an abundant number, since it is smaller than the sum of its proper divisors (21092289109590).

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

12001551343530 is a wasteful number, since it uses less digits than its factorization.

12001551343530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358304.

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 12001551343530 its reverse (3534315510021), we get a palindrome (15535866853551).

The spelling of 12001551343530 in words is "twelve trillion, one billion, five hundred fifty-one million, three hundred forty-three thousand, five hundred thirty".