1012123110120 has 64 divisors (see below), whose sum is σ = 3038035576320. Its totient is φ = 269751385344.

The previous prime is 1012123110091. The next prime is 1012123110143. The reversal of 1012123110120 is 210113212101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1012123110120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2094559 + ... + 2532078.

It is an arithmetic number, because the mean of its divisors is an integer number (47469305880).

Almost surely, 2^{1012123110120} is an apocalyptic number.

1012123110120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012123110120 is an abundant number, since it is smaller than the sum of its proper divisors (2025912466200).

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

1012123110120 is a wasteful number, since it uses less digits than its factorization.

1012123110120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628474 (or 4628470 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1012123110120 its reverse (210113212101), we get a palindrome (1222236322221).

The spelling of 1012123110120 in words is "one trillion, twelve billion, one hundred twenty-three million, one hundred ten thousand, one hundred twenty".