1125138828212 has 48 divisors (see below), whose sum is σ = 2327998686720. Its totient is φ = 465549638400.

The previous prime is 1125138828193. The next prime is 1125138828217. The reversal of 1125138828212 is 2128288315211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125138828217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28652912 + ... + 28692152.

It is an arithmetic number, because the mean of its divisors is an integer number (48499972640).

Almost surely, 2^{1125138828212} is an apocalyptic number.

It is an amenable number.

1125138828212 is an abundant number, since it is smaller than the sum of its proper divisors (1202859858508).

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

1125138828212 is a wasteful number, since it uses less digits than its factorization.

1125138828212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74592 (or 74590 counting only the distinct ones).

The product of its digits is 122880, while the sum is 44.

The spelling of 1125138828212 in words is "one trillion, one hundred twenty-five billion, one hundred thirty-eight million, eight hundred twenty-eight thousand, two hundred twelve".