1212311101300 has 72 divisors (see below), whose sum is σ = 2909647574456. Its totient is φ = 435524636160.

The previous prime is 1212311101279. The next prime is 1212311101307. The reversal of 1212311101300 is 31011132121.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 429022380004 + 783288721296 = 654998^2 + 885036^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212311101307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12553887 + ... + 12650086.

Almost surely, 2^{1212311101300} is an apocalyptic number.

1212311101300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212311101300 is an abundant number, since it is smaller than the sum of its proper divisors (1697336473156).

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

1212311101300 is a wasteful number, since it uses less digits than its factorization.

1212311101300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25204037 (or 25204030 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1212311101300 its reverse (31011132121), we get a palindrome (1243322233421).

The spelling of 1212311101300 in words is "one trillion, two hundred twelve billion, three hundred eleven million, one hundred one thousand, three hundred".