1228931215512 has 384 divisors, whose sum is σ = 4312247466240. Its totient is φ = 286683909120.

The previous prime is 1228931215459. The next prime is 1228931215513. The reversal of 1228931215512 is 2155121398221.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228931215513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6123463 + ... + 6320969.

It is an arithmetic number, because the mean of its divisors is an integer number (11229811110).

Almost surely, 2^{1228931215512} is an apocalyptic number.

1228931215512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1228931215512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2156123733120).

1228931215512 is an abundant number, since it is smaller than the sum of its proper divisors (3083316250728).

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

1228931215512 is a wasteful number, since it uses less digits than its factorization.

1228931215512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197591 (or 197580 counting only the distinct ones).

The product of its digits is 86400, while the sum is 42.

The spelling of 1228931215512 in words is "one trillion, two hundred twenty-eight billion, nine hundred thirty-one million, two hundred fifteen thousand, five hundred twelve".