1212800128530 has 16 divisors (see below), whose sum is σ = 2910720308544. Its totient is φ = 323413367600.

The previous prime is 1212800128483. The next prime is 1212800128537. The reversal of 1212800128530 is 358210082121.

It is a junction number, because it is equal to n+sod(n) for n = 1212800128491 and 1212800128500.

It is not an unprimeable number, because it can be changed into a prime (1212800128537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20213335446 + ... + 20213335505.

It is an arithmetic number, because the mean of its divisors is an integer number (181920019284).

Almost surely, 2^{1212800128530} is an apocalyptic number.

1212800128530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212800128530 is an abundant number, since it is smaller than the sum of its proper divisors (1697920180014).

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

1212800128530 is a wasteful number, since it uses less digits than its factorization.

1212800128530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40426670961.

The product of its (nonzero) digits is 7680, while the sum is 33.

The spelling of 1212800128530 in words is "one trillion, two hundred twelve billion, eight hundred million, one hundred twenty-eight thousand, five hundred thirty".