1016721056611 has 16 divisors (see below), whose sum is σ = 1114535181760. Its totient is φ = 921814318080.

The previous prime is 1016721056599. The next prime is 1016721056623. The reversal of 1016721056611 is 1166501276101.

1016721056611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1016721056599) and next prime (1016721056623).

It is a cyclic number.

It is not a de Polignac number, because 1016721056611 - 2³⁵ = 982361318243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1016721056411) 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, 1994031 + ... + 2451448.

It is an arithmetic number, because the mean of its divisors is an integer number (69658448860).

Almost surely, 2^{1016721056611} is an apocalyptic number.

1016721056611 is a deficient number, since it is larger than the sum of its proper divisors (97814125149).

1016721056611 is a wasteful number, since it uses less digits than its factorization.

1016721056611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445806.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 1016721056611 in words is "one trillion, sixteen billion, seven hundred twenty-one million, fifty-six thousand, six hundred eleven".