1213203103000 has 384 divisors, whose sum is σ = 3497620538880. Its totient is φ = 391907577600.

The previous prime is 1213203102989. The next prime is 1213203103003. The reversal of 1213203103000 is 3013023121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213203103003) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 75500967 + ... + 75517033.

It is an arithmetic number, because the mean of its divisors is an integer number (9108386820).

Almost surely, 2^{1213203103000} is an apocalyptic number.

1213203103000 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 1213203103000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1748810269440).

1213203103000 is an abundant number, since it is smaller than the sum of its proper divisors (2284417435880).

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

1213203103000 is a wasteful number, since it uses less digits than its factorization.

1213203103000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16192 (or 16171 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1213203103000 its reverse (3013023121), we get a palindrome (1216216126121).

The spelling of 1213203103000 in words is "one trillion, two hundred thirteen billion, two hundred three million, one hundred three thousand".