100121312 has 12 divisors (see below), whose sum is σ = 197113896. Its totient is φ = 50060640.

The previous prime is 100121299. The next prime is 100121321. The reversal of 100121312 is 213121001.

It is a junction number, because it is equal to n+sod(n) for n = 100121293 and 100121302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564364 + ... + 1564427.

It is an arithmetic number, because the mean of its divisors is an integer number (16426158).

Almost surely, 2^100121312 is an apocalyptic number.

It is an amenable number.

100121312 is a deficient number, since it is larger than the sum of its proper divisors (96992584).

100121312 is an equidigital number, since it uses as much as digits as its factorization.

100121312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128801 (or 3128793 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 100121312 is about 10006.0637615398. The cubic root of 100121312 is about 464.3465009890.

Adding to 100121312 its reverse (213121001), we get a palindrome (313242313).

It can be divided in two parts, 1001 and 21312, that multiplied together give a palindrome (21333312).

The spelling of 100121312 in words is "one hundred million, one hundred twenty-one thousand, three hundred twelve".