1281823120212 has 24 divisors (see below), whose sum is σ = 3148337488800. Its totient is φ = 404786248416.

The previous prime is 1281823120199. The next prime is 1281823120213. The reversal of 1281823120212 is 2120213281821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281823120213) 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, 2811015387 + ... + 2811015842.

It is an arithmetic number, because the mean of its divisors is an integer number (131180728700).

Almost surely, 2^{1281823120212} is an apocalyptic number.

1281823120212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1281823120212 is an abundant number, since it is smaller than the sum of its proper divisors (1866514368588).

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

1281823120212 is a wasteful number, since it uses less digits than its factorization.

1281823120212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5622031255 (or 5622031253 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The spelling of 1281823120212 in words is "one trillion, two hundred eighty-one billion, eight hundred twenty-three million, one hundred twenty thousand, two hundred twelve".