2012123128 has 48 divisors (see below), whose sum is σ = 4044109680. Its totient is φ = 935214336.

The previous prime is 2012123119. The next prime is 2012123137. The reversal of 2012123128 is 8213212102.

It is an interprime number because it is at equal distance from previous prime (2012123119) and next prime (2012123137).

It is a junction number, because it is equal to n+sod(n) for n = 2012123099 and 2012123108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5308843 + ... + 5309221.

It is an arithmetic number, because the mean of its divisors is an integer number (84252285).

Almost surely, 2^2012123128 is an apocalyptic number.

It is an amenable number.

2012123128 is an abundant number, since it is smaller than the sum of its proper divisors (2031986552).

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

2012123128 is a wasteful number, since it uses less digits than its factorization.

2012123128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 2012123128 is about 44856.6954645569. The cubic root of 2012123128 is about 1262.4616208704.

The spelling of 2012123128 in words is "two billion, twelve million, one hundred twenty-three thousand, one hundred twenty-eight".