1312121220300 has 108 divisors (see below), whose sum is σ = 4486659382296. Its totient is φ = 318089990400.

The previous prime is 1312121220253. The next prime is 1312121220329. The reversal of 1312121220300 is 30221212131.

1312121220300 is a `hidden beast` number, since 1 + 3 + 121 + 21 + 220 + 300 = 666.

It is a super-2 number, since 2×1312121220300² (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 an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 66258849 + ... + 66278648.

Almost surely, 2^{1312121220300} is an apocalyptic number.

1312121220300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312121220300 is an abundant number, since it is smaller than the sum of its proper divisors (3174538161996).

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

1312121220300 is a wasteful number, since it uses less digits than its factorization.

1312121220300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132537528 (or 132537518 counting only the distinct ones).

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

Adding to 1312121220300 its reverse (30221212131), we get a palindrome (1342342432431).

The spelling of 1312121220300 in words is "one trillion, three hundred twelve billion, one hundred twenty-one million, two hundred twenty thousand, three hundred".