106871572121 has 4 divisors (see below), whose sum is σ = 108888016932. Its totient is φ = 104855127312.

The previous prime is 106871572111. The next prime is 106871572133. The reversal of 106871572121 is 121275178601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121275178601 = 53 ⋅2288210917.

It can be written as a sum of positive squares in 2 ways, for example, as 25301356096 + 81570216025 = 159064^2 + 285605^2 .

It is a cyclic number.

It is not a de Polignac number, because 106871572121 - 2⁶ = 106871572057 is a prime.

It is a super-2 number, since 2×106871572121² (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 (106871572111) 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, 1008222326 + ... + 1008222431.

It is an arithmetic number, because the mean of its divisors is an integer number (27222004233).

Almost surely, 2^106871572121 is an apocalyptic number.

It is an amenable number.

106871572121 is a deficient number, since it is larger than the sum of its proper divisors (2016444811).

106871572121 is an equidigital number, since it uses as much as digits as its factorization.

106871572121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016444810.

The product of its (nonzero) digits is 47040, while the sum is 41.

The spelling of 106871572121 in words is "one hundred six billion, eight hundred seventy-one million, five hundred seventy-two thousand, one hundred twenty-one".