170103121921 has 8 divisors (see below), whose sum is σ = 171707874624. Its totient is φ = 168498647280.

The previous prime is 170103121841. The next prime is 170103121927. The reversal of 170103121921 is 129121301071.

170103121921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 170103121921 - 2²⁹ = 169566251009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 170103121921.

It is not an unprimeable number, because it can be changed into a prime (170103121927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283211 + ... + 1409551.

It is an arithmetic number, because the mean of its divisors is an integer number (21463484328).

Almost surely, 2^170103121921 is an apocalyptic number.

It is an amenable number.

170103121921 is a deficient number, since it is larger than the sum of its proper divisors (1604752703).

170103121921 is a wasteful number, since it uses less digits than its factorization.

170103121921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139031.

The product of its (nonzero) digits is 756, while the sum is 28.

Adding to 170103121921 its reverse (129121301071), we get a palindrome (299224422992).

The spelling of 170103121921 in words is "one hundred seventy billion, one hundred three million, one hundred twenty-one thousand, nine hundred twenty-one".