3699687111121 has 8 divisors (see below), whose sum is σ = 3722520678344. Its totient is φ = 3676923694080.

The previous prime is 3699687111059. The next prime is 3699687111173. The reversal of 3699687111121 is 1211117869963.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 506532547521 + 3193154563600 = 711711^2 + 1786940^2 .

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 3699687111121 - 2⁷ = 3699687110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3699687111221) 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, 17431740 + ... + 17642701.

It is an arithmetic number, because the mean of its divisors is an integer number (465315084793).

Almost surely, 2^{3699687111121} is an apocalyptic number.

It is an amenable number.

3699687111121 is a deficient number, since it is larger than the sum of its proper divisors (22833567223).

3699687111121 is a wasteful number, since it uses less digits than its factorization.

3699687111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35075091.

The product of its digits is 979776, while the sum is 55.

The spelling of 3699687111121 in words is "three trillion, six hundred ninety-nine billion, six hundred eighty-seven million, one hundred eleven thousand, one hundred twenty-one".