16870893121 has 4 divisors (see below), whose sum is σ = 16924794052. Its totient is φ = 16816992192.

The previous prime is 16870893113. The next prime is 16870893157. The reversal of 16870893121 is 12139807861.

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: 12139807861 = 11113 ⋅1092397.

It can be written as a sum of positive squares in 2 ways, for example, as 2604979521 + 14265913600 = 51039^2 + 119440^2 .

It is a cyclic number.

It is not a de Polignac number, because 16870893121 - 2³ = 16870893113 is a prime.

It is a super-3 number, since 3×16870893121³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16870893181) 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, 26949996 + ... + 26950621.

It is an arithmetic number, because the mean of its divisors is an integer number (4231198513).

Almost surely, 2^16870893121 is an apocalyptic number.

It is an amenable number.

16870893121 is a deficient number, since it is larger than the sum of its proper divisors (53900931).

16870893121 is an equidigital number, since it uses as much as digits as its factorization.

16870893121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53900930.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 16870893121 in words is "sixteen billion, eight hundred seventy million, eight hundred ninety-three thousand, one hundred twenty-one".