1200203945148 has 108 divisors (see below), whose sum is σ = 3200473673208. Its totient is φ = 349856807040.

The previous prime is 1200203945147. The next prime is 1200203945183. The reversal of 1200203945148 is 8415493020021.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200203945147) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 87583 + ... + 1551798.

Almost surely, 2^{1200203945148} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200203945148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1600236836604).

1200203945148 is an abundant number, since it is smaller than the sum of its proper divisors (2000269728060).

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

1200203945148 is a wasteful number, since it uses less digits than its factorization.

1200203945148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639452 (or 1639418 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

Adding to 1200203945148 its reverse (8415493020021), we get a palindrome (9615696965169).

The spelling of 1200203945148 in words is "one trillion, two hundred billion, two hundred three million, nine hundred forty-five thousand, one hundred forty-eight".