2012343123 has 24 divisors (see below), whose sum is σ = 3136915200. Its totient is φ = 1144115280.

The previous prime is 2012343121. The next prime is 2012343127. The reversal of 2012343123 is 3213432102.

It is not a de Polignac number, because 2012343123 - 2¹ = 2012343121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 2012343123.

It is not an unprimeable number, because it can be changed into a prime (2012343121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5143 + ... + 63648.

It is an arithmetic number, because the mean of its divisors is an integer number (130704800).

Almost surely, 2^2012343123 is an apocalyptic number.

2012343123 is a deficient number, since it is larger than the sum of its proper divisors (1124572077).

2012343123 is a wasteful number, since it uses less digits than its factorization.

2012343123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69007 (or 69000 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 2012343123 is about 44859.1475955574. The cubic root of 2012343123 is about 1262.5076295066.

Adding to 2012343123 its reverse (3213432102), we get a palindrome (5225775225).

The spelling of 2012343123 in words is "two billion, twelve million, three hundred forty-three thousand, one hundred twenty-three".