1012155025120 has 24 divisors (see below), whose sum is σ = 2391216247224. Its totient is φ = 404862009984.

The previous prime is 1012155025081. The next prime is 1012155025127. The reversal of 1012155025120 is 215205512101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012155025127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3162984294 + ... + 3162984613.

It is an arithmetic number, because the mean of its divisors is an integer number (99634010301).

Almost surely, 2^{1012155025120} is an apocalyptic number.

1012155025120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012155025120 is an abundant number, since it is smaller than the sum of its proper divisors (1379061222104).

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

1012155025120 is an equidigital number, since it uses as much as digits as its factorization.

1012155025120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6325968922 (or 6325968914 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

The spelling of 1012155025120 in words is "one trillion, twelve billion, one hundred fifty-five million, twenty-five thousand, one hundred twenty".