1203312002100 has 72 divisors (see below), whose sum is σ = 3749396794080. Its totient is φ = 296199876480.

The previous prime is 1203312002041. The next prime is 1203312002117. The reversal of 1203312002100 is 12002133021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1203312002100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154266870 + ... + 154274669.

Almost surely, 2^{1203312002100} is an apocalyptic number.

1203312002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203312002100 is an abundant number, since it is smaller than the sum of its proper divisors (2546084791980).

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

1203312002100 is a wasteful number, since it uses less digits than its factorization.

1203312002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308541569 (or 308541562 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1203312002100 its reverse (12002133021), we get a palindrome (1215314135121).

The spelling of 1203312002100 in words is "one trillion, two hundred three billion, three hundred twelve million, two thousand, one hundred".