1203121432100 has 144 divisors (see below), whose sum is σ = 3030328046592. Its totient is φ = 406066573440.

The previous prime is 1203121432067. The next prime is 1203121432129. The reversal of 1203121432100 is 12341213021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76298417 + ... + 76314183.

It is an arithmetic number, because the mean of its divisors is an integer number (21043944768).

Almost surely, 2^{1203121432100} is an apocalyptic number.

1203121432100 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 1203121432100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1515164023296).

1203121432100 is an abundant number, since it is smaller than the sum of its proper divisors (1827206614492).

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

1203121432100 is a wasteful number, since it uses less digits than its factorization.

1203121432100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17482 (or 17475 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1203121432100 its reverse (12341213021), we get a palindrome (1215462645121).

The spelling of 1203121432100 in words is "one trillion, two hundred three billion, one hundred twenty-one million, four hundred thirty-two thousand, one hundred".