1211312002200 has 96 divisors (see below), whose sum is σ = 3793779422160. Its totient is φ = 319686451200.

The previous prime is 1211312002171. The next prime is 1211312002211. The reversal of 1211312002200 is 22002131121.

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 1211312002200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10348261 + ... + 10464660.

Almost surely, 2^{1211312002200} is an apocalyptic number.

1211312002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211312002200 is an abundant number, since it is smaller than the sum of its proper divisors (2582467419960).

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

1211312002200 is a wasteful number, since it uses less digits than its factorization.

1211312002200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20813037 (or 20813028 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1211312002200 its reverse (22002131121), we get a palindrome (1233314133321).

The spelling of 1211312002200 in words is "one trillion, two hundred eleven billion, three hundred twelve million, two thousand, two hundred".