1312121230200 has 192 divisors, whose sum is σ = 4930395148800. Its totient is φ = 318089980800.

The previous prime is 1312121230129. The next prime is 1312121230213. The reversal of 1312121230200 is 20321212131.

1312121230200 is a `hidden beast` number, since 1 + 312 + 121 + 2 + 30 + 200 = 666.

It is a super-2 number, since 2×1312121230200² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10985392 + ... + 11104191.

It is an arithmetic number, because the mean of its divisors is an integer number (25679141400).

Almost surely, 2^{1312121230200} is an apocalyptic number.

1312121230200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312121230200 is an abundant number, since it is smaller than the sum of its proper divisors (3618273918600).

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

1312121230200 is a wasteful number, since it uses less digits than its factorization.

1312121230200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22089619 (or 22089604 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1312121230200 its reverse (20321212131), we get a palindrome (1332442442331).

The spelling of 1312121230200 in words is "one trillion, three hundred twelve billion, one hundred twenty-one million, two hundred thirty thousand, two hundred".