921122011 has 4 divisors (see below), whose sum is σ = 921182800. Its totient is φ = 921061224.

The previous prime is 921121997. The next prime is 921122017. The reversal of 921122011 is 110221129.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 921122011 - 2⁹ = 921121499 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 921122011.

It is not an unprimeable number, because it can be changed into a prime (921122017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12745 + ... + 44773.

It is an arithmetic number, because the mean of its divisors is an integer number (230295700).

Almost surely, 2^921122011 is an apocalyptic number.

921122011 is a deficient number, since it is larger than the sum of its proper divisors (60789).

921122011 is a wasteful number, since it uses less digits than its factorization.

921122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60788.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 921122011 is about 30349.9919439858. The cubic root of 921122011 is about 972.9840479719.

The spelling of 921122011 in words is "nine hundred twenty-one million, one hundred twenty-two thousand, eleven".