100011212120123 has 4 divisors (see below), whose sum is σ = 101650740187728. Its totient is φ = 98371684052520.

The previous prime is 100011212120087. The next prime is 100011212120159. The reversal of 100011212120123 is 321021212110001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (100011212120087) and next prime (100011212120159).

It is a cyclic number.

It is not a de Polignac number, because 100011212120123 - 2⁶ = 100011212120059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100011212122123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819764033711 + ... + 819764033832.

It is an arithmetic number, because the mean of its divisors is an integer number (25412685046932).

Almost surely, 2^{100011212120123} is an apocalyptic number.

100011212120123 is a deficient number, since it is larger than the sum of its proper divisors (1639528067605).

100011212120123 is an equidigital number, since it uses as much as digits as its factorization.

100011212120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1639528067604.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 100011212120123 its reverse (321021212110001), we get a palindrome (421032424230124).

The spelling of 100011212120123 in words is "one hundred trillion, eleven billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-three".