1711521121999 has 16 divisors (see below), whose sum is σ = 1845149644800. Its totient is φ = 1578175400160.

The previous prime is 1711521121949. The next prime is 1711521122009. The reversal of 1711521121999 is 9991211251171.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1711521121999 - 2¹⁵ = 1711521089231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1711521121949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48728454 + ... + 48763564.

It is an arithmetic number, because the mean of its divisors is an integer number (115321852800).

Almost surely, 2^{1711521121999} is an apocalyptic number.

1711521121999 is a deficient number, since it is larger than the sum of its proper divisors (133628522801).

1711521121999 is a wasteful number, since it uses less digits than its factorization.

1711521121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39030.

The product of its digits is 102060, while the sum is 49.

The spelling of 1711521121999 in words is "one trillion, seven hundred eleven billion, five hundred twenty-one million, one hundred twenty-one thousand, nine hundred ninety-nine".