691211210000011 has 4 divisors (see below), whose sum is σ = 691221420133000. Its totient is φ = 691200999867024.

The previous prime is 691211209999991. The next prime is 691211210000021. The reversal of 691211210000011 is 110000012112196.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-691211210000011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691211210000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5104964946 + ... + 5105100343.

It is an arithmetic number, because the mean of its divisors is an integer number (172805355033250).

Almost surely, 2^{691211210000011} is an apocalyptic number.

691211210000011 is a deficient number, since it is larger than the sum of its proper divisors (10210132989).

691211210000011 is a wasteful number, since it uses less digits than its factorization.

691211210000011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210132988.

The product of its (nonzero) digits is 216, while the sum is 25.

The spelling of 691211210000011 in words is "six hundred ninety-one trillion, two hundred eleven billion, two hundred ten million, eleven", and thus it is an aban number.