10101112123 has 4 divisors (see below), whose sum is σ = 10104268968. Its totient is φ = 10097955280.

The previous prime is 10101112121. The next prime is 10101112129. The reversal of 10101112123 is 32121110101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32121110101 = 457 ⋅70286893.

It is a cyclic number.

It is not a de Polignac number, because 10101112123 - 2¹ = 10101112121 is a prime.

It is a super-3 number, since 3×10101112123³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10101112121) 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, 1573618 + ... + 1580023.

It is an arithmetic number, because the mean of its divisors is an integer number (2526067242).

Almost surely, 2^10101112123 is an apocalyptic number.

10101112123 is a deficient number, since it is larger than the sum of its proper divisors (3156845).

10101112123 is an equidigital number, since it uses as much as digits as its factorization.

10101112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3156844.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10101112123 its reverse (32121110101), we get a palindrome (42222222224).

The spelling of 10101112123 in words is "ten billion, one hundred one million, one hundred twelve thousand, one hundred twenty-three".