11110021021 has 4 divisors (see below), whose sum is σ = 12120022944. Its totient is φ = 10100019100.

The previous prime is 11110021009. The next prime is 11110021061. The reversal of 11110021021 is 12012001111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11110021021 - 2²³ = 11101632413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11110020989 and 11110021007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110021001) 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, 505000945 + ... + 505000966.

It is an arithmetic number, because the mean of its divisors is an integer number (3030005736).

Almost surely, 2^11110021021 is an apocalyptic number.

11110021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11110021021 is a deficient number, since it is larger than the sum of its proper divisors (1010001923).

11110021021 is a wasteful number, since it uses less digits than its factorization.

11110021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010001922.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11110021021 its reverse (12012001111), we get a palindrome (23122022132).

The spelling of 11110021021 in words is "eleven billion, one hundred ten million, twenty-one thousand, twenty-one".