1203211100100 has 72 divisors (see below), whose sum is σ = 3483525165120. Its totient is φ = 320650359680.

The previous prime is 1203211100099. The next prime is 1203211100149. The reversal of 1203211100100 is 10011123021.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 818607 + ... + 1754006.

It is an arithmetic number, because the mean of its divisors is an integer number (48382293960).

Almost surely, 2^{1203211100100} is an apocalyptic number.

1203211100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203211100100 is an abundant number, since it is smaller than the sum of its proper divisors (2280314065020).

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

1203211100100 is a wasteful number, since it uses less digits than its factorization.

1203211100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574189 (or 2574182 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 1203211100100 its reverse (10011123021), we get a palindrome (1213222223121).

The spelling of 1203211100100 in words is "one trillion, two hundred three billion, two hundred eleven million, one hundred thousand, one hundred".