123011812 has 24 divisors (see below), whose sum is σ = 268390080. Its totient is φ = 47926560.

The previous prime is 123011773. The next prime is 123011827. The reversal of 123011812 is 218110321.

It is a self number, because there is not a number n which added to its sum of digits gives 123011812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199387 + ... + 200002.

It is an arithmetic number, because the mean of its divisors is an integer number (11182920).

Almost surely, 2^123011812 is an apocalyptic number.

It is an amenable number.

123011812 is an abundant number, since it is smaller than the sum of its proper divisors (145378268).

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

123011812 is a wasteful number, since it uses less digits than its factorization.

123011812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399411 (or 399409 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 123011812 is about 11091.0690197113. The cubic root of 123011812 is about 497.3349024157.

The spelling of 123011812 in words is "one hundred twenty-three million, eleven thousand, eight hundred twelve".