106281905123 has 4 divisors (see below), whose sum is σ = 107562410088. Its totient is φ = 105001400160.

The previous prime is 106281905099. The next prime is 106281905137. The reversal of 106281905123 is 321509182601.

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: 321509182601 = 149 ⋅2157779749.

It is a cyclic number.

It is not a de Polignac number, because 106281905123 - 2²⁴ = 106265127907 is a prime.

It is a super-2 number, since 2×106281905123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106281901123) 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, 640252358 + ... + 640252523.

It is an arithmetic number, because the mean of its divisors is an integer number (26890602522).

Almost surely, 2^106281905123 is an apocalyptic number.

106281905123 is a deficient number, since it is larger than the sum of its proper divisors (1280504965).

106281905123 is an equidigital number, since it uses as much as digits as its factorization.

106281905123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280504964.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 106281905123 in words is "one hundred six billion, two hundred eighty-one million, nine hundred five thousand, one hundred twenty-three".