1212553545000 has 320 divisors, whose sum is σ = 4402560729600. Its totient is φ = 272456160000.

The previous prime is 1212553544929. The next prime is 1212553545013. The reversal of 1212553545000 is 5453552121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6097135 + ... + 6292865.

It is an arithmetic number, because the mean of its divisors is an integer number (13758002280).

Almost surely, 2^{1212553545000} is an apocalyptic number.

1212553545000 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 1212553545000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2201280364800).

1212553545000 is an abundant number, since it is smaller than the sum of its proper divisors (3190007184600).

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

1212553545000 is a wasteful number, since it uses less digits than its factorization.

1212553545000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195826 (or 195807 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

The spelling of 1212553545000 in words is "one trillion, two hundred twelve billion, five hundred fifty-three million, five hundred forty-five thousand".