1705231556121 has 8 divisors (see below), whose sum is σ = 2273662337760. Its totient is φ = 1136810905952.

The previous prime is 1705231556057. The next prime is 1705231556141. The reversal of 1705231556121 is 1216551325071.

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 1705231556121 - 2⁶ = 1705231556057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1705231556121.

It is not an unprimeable number, because it can be changed into a prime (1705231556141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2131035 + ... + 2819888.

It is an arithmetic number, because the mean of its divisors is an integer number (284207792220).

Almost surely, 2^{1705231556121} is an apocalyptic number.

It is an amenable number.

1705231556121 is a deficient number, since it is larger than the sum of its proper divisors (568430781639).

1705231556121 is a wasteful number, since it uses less digits than its factorization.

1705231556121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065735.

The product of its (nonzero) digits is 63000, while the sum is 39.

The spelling of 1705231556121 in words is "one trillion, seven hundred five billion, two hundred thirty-one million, five hundred fifty-six thousand, one hundred twenty-one".