11012121091 has 4 divisors (see below), whose sum is σ = 11119034992. Its totient is φ = 10905207192.

The previous prime is 11012121089. The next prime is 11012121119. The reversal of 11012121091 is 19012121011.

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 11012121091 - 2¹ = 11012121089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11012121011) 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, 53456796 + ... + 53457001.

It is an arithmetic number, because the mean of its divisors is an integer number (2779758748).

Almost surely, 2^11012121091 is an apocalyptic number.

11012121091 is a deficient number, since it is larger than the sum of its proper divisors (106913901).

11012121091 is a wasteful number, since it uses less digits than its factorization.

11012121091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106913900.

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

The spelling of 11012121091 in words is "eleven billion, twelve million, one hundred twenty-one thousand, ninety-one".