921001011011011 has 32 divisors (see below), whose sum is σ = 1082026042327040. Its totient is φ = 767646527240736.

The previous prime is 921001011011009. The next prime is 921001011011051. The reversal of 921001011011011 is 110110110100129.

It is a cyclic number.

It is not a de Polignac number, because 921001011011011 - 2¹ = 921001011011009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 921001011011011.

It is not an unprimeable number, because it can be changed into a prime (921001011011051) 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 31 ways as a sum of consecutive naturals, for example, 179126110 + ... + 184195996.

It is an arithmetic number, because the mean of its divisors is an integer number (33813313822720).

Almost surely, 2^{921001011011011} is an apocalyptic number.

921001011011011 is a deficient number, since it is larger than the sum of its proper divisors (161025031316029).

921001011011011 is a wasteful number, since it uses less digits than its factorization.

921001011011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5074943.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 921001011011011 in words is "nine hundred twenty-one trillion, one billion, eleven million, eleven thousand, eleven".