1211212103200 has 72 divisors (see below), whose sum is σ = 3225678074640. Its totient is φ = 440440761600.

The previous prime is 1211212103183. The next prime is 1211212103221. The reversal of 1211212103200 is 23012121121.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 11 ways as a sum of consecutive naturals, for example, 68810070 + ... + 68827669.

It is an arithmetic number, because the mean of its divisors is an integer number (44801084370).

Almost surely, 2^{1211212103200} is an apocalyptic number.

1211212103200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211212103200 is an abundant number, since it is smaller than the sum of its proper divisors (2014465971440).

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

1211212103200 is a wasteful number, since it uses less digits than its factorization.

1211212103200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137637770 (or 137637757 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211212103200 its reverse (23012121121), we get a palindrome (1234224224321).

The spelling of 1211212103200 in words is "one trillion, two hundred eleven billion, two hundred twelve million, one hundred three thousand, two hundred".