1100689135721 has 16 divisors (see below), whose sum is σ = 1290170125440. Its totient is φ = 919323726720.

The previous prime is 1100689135709. The next prime is 1100689135757. The reversal of 1100689135721 is 1275319860011.

It is not a de Polignac number, because 1100689135721 - 2⁶ = 1100689135657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1100689135421) 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, 2081366 + ... + 2556063.

It is an arithmetic number, because the mean of its divisors is an integer number (80635632840).

Almost surely, 2^{1100689135721} is an apocalyptic number.

It is an amenable number.

1100689135721 is a deficient number, since it is larger than the sum of its proper divisors (189480989719).

1100689135721 is an equidigital number, since it uses as much as digits as its factorization.

1100689135721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638304.

The product of its (nonzero) digits is 90720, while the sum is 44.

The spelling of 1100689135721 in words is "one trillion, one hundred billion, six hundred eighty-nine million, one hundred thirty-five thousand, seven hundred twenty-one".