100212123 has 8 divisors (see below), whose sum is σ = 145763136. Its totient is φ = 60734600.

The previous prime is 100212121. The next prime is 100212143. The reversal of 100212123 is 321212001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100212123 - 2¹ = 100212121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100212099 and 100212108.

It is not an unprimeable number, because it can be changed into a prime (100212121) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1518333 + ... + 1518398.

It is an arithmetic number, because the mean of its divisors is an integer number (18220392).

Almost surely, 2^100212123 is an apocalyptic number.

100212123 is a deficient number, since it is larger than the sum of its proper divisors (45551013).

100212123 is a wasteful number, since it uses less digits than its factorization.

100212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3036745.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 100212123 is about 10010.6005314367. The cubic root of 100212123 is about 464.4868474907.

Adding to 100212123 its reverse (321212001), we get a palindrome (421424124).

The spelling of 100212123 in words is "one hundred million, two hundred twelve thousand, one hundred twenty-three".