1691100221229 has 20 divisors (see below), whose sum is σ = 2541709691136. Its totient is φ = 1120483573416.

The previous prime is 1691100221227. The next prime is 1691100221231. The reversal of 1691100221229 is 9221220011961.

It is an interprime number because it is at equal distance from previous prime (1691100221227) and next prime (1691100221231).

It is not a de Polignac number, because 1691100221229 - 2¹ = 1691100221227 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1691100221193 and 1691100221202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1691100221221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 64029069 + ... + 64055474.

Almost surely, 2^{1691100221229} is an apocalyptic number.

It is an amenable number.

1691100221229 is a deficient number, since it is larger than the sum of its proper divisors (850609469907).

1691100221229 is a wasteful number, since it uses less digits than its factorization.

1691100221229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128084718 (or 128084709 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The spelling of 1691100221229 in words is "one trillion, six hundred ninety-one billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-nine".