123111142340 has 24 divisors (see below), whose sum is σ = 258540297792. Its totient is φ = 49243142880.

The previous prime is 123111142331. The next prime is 123111142393. The reversal of 123111142340 is 43241111321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103735 + ... + 1210145.

It is an arithmetic number, because the mean of its divisors is an integer number (10772512408).

Almost surely, 2^123111142340 is an apocalyptic number.

123111142340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123111142340 is an abundant number, since it is smaller than the sum of its proper divisors (135429155452).

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

123111142340 is a wasteful number, since it uses less digits than its factorization.

123111142340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164267 (or 164265 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 123111142340 its reverse (43241111321), we get a palindrome (166352253661).

The spelling of 123111142340 in words is "one hundred twenty-three billion, one hundred eleven million, one hundred forty-two thousand, three hundred forty".