100123121312 has 24 divisors (see below), whose sum is σ = 197419300596. Its totient is φ = 49984886272.

The previous prime is 100123121269. The next prime is 100123121321. The reversal of 100123121312 is 213121321001.

It can be written as a sum of positive squares in 2 ways, for example, as 75975204496 + 24147916816 = 275636^2 + 155396^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374853 + ... + 2416644.

Almost surely, 2^100123121312 is an apocalyptic number.

It is an amenable number.

100123121312 is a deficient number, since it is larger than the sum of its proper divisors (97296179284).

100123121312 is an equidigital number, since it uses as much as digits as its factorization.

100123121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792160 (or 4792152 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 100123121312 its reverse (213121321001), we get a palindrome (313244442313).

The spelling of 100123121312 in words is "one hundred billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred twelve".