11101011021 has 12 divisors (see below), whose sum is σ = 16407696448. Its totient is φ = 7228565064.

The previous prime is 11101011017. The next prime is 11101011113. The reversal of 11101011021 is 12011010111.

It is not a de Polignac number, because 11101011021 - 2² = 11101011017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11101010994 and 11101011012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101011001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14342005 + ... + 14342778.

Almost surely, 2^11101011021 is an apocalyptic number.

It is an amenable number.

11101011021 is a deficient number, since it is larger than the sum of its proper divisors (5306685427).

11101011021 is a wasteful number, since it uses less digits than its factorization.

11101011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28684832 (or 28684829 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 11101011021 its reverse (12011010111), we get a palindrome (23112021132).

The spelling of 11101011021 in words is "eleven billion, one hundred one million, eleven thousand, twenty-one".