123012999998 has 32 divisors (see below), whose sum is σ = 211299770880. Its totient is φ = 52614888480.

The previous prime is 123012999881. The next prime is 123013000039. The reversal of 123012999998 is 899999210321.

It is a self number, because there is not a number n which added to its sum of digits gives 123012999998.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16205588 + ... + 16213176.

It is an arithmetic number, because the mean of its divisors is an integer number (6603117840).

Almost surely, 2^123012999998 is an apocalyptic number.

123012999998 is a deficient number, since it is larger than the sum of its proper divisors (88286770882).

123012999998 is a wasteful number, since it uses less digits than its factorization.

123012999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9752.

The product of its (nonzero) digits is 5668704, while the sum is 62.

The spelling of 123012999998 in words is "one hundred twenty-three billion, twelve million, nine hundred ninety-nine thousand, nine hundred ninety-eight".