9121121011 has 4 divisors (see below), whose sum is σ = 9128425000. Its totient is φ = 9113817024.

The previous prime is 9121120961. The next prime is 9121121033. The reversal of 9121121011 is 1101211219.

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

It is a cyclic number.

It is not a de Polignac number, because 9121121011 - 2¹⁷ = 9120989939 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 9121121011.

It is not an unprimeable number, because it can be changed into a prime (9121121081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3650121 + ... + 3652618.

It is an arithmetic number, because the mean of its divisors is an integer number (2282106250).

Almost surely, 2^9121121011 is an apocalyptic number.

9121121011 is a deficient number, since it is larger than the sum of its proper divisors (7303989).

9121121011 is a wasteful number, since it uses less digits than its factorization.

9121121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7303988.

The product of its (nonzero) digits is 36, while the sum is 19.

The square root of 9121121011 is about 95504.5601581411. The cubic root of 9121121011 is about 2089.3734537437.

The spelling of 9121121011 in words is "nine billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".