11100002021 has 4 divisors (see below), whose sum is σ = 11100376032. Its totient is φ = 11099628012.

The previous prime is 11100001999. The next prime is 11100002033. The reversal of 11100002021 is 12020000111.

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 a de Polignac number, because none of the positive numbers 2^k-11100002021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100002821) 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, 138251 + ... + 203256.

It is an arithmetic number, because the mean of its divisors is an integer number (2775094008).

Almost surely, 2^11100002021 is an apocalyptic number.

It is an amenable number.

11100002021 is a deficient number, since it is larger than the sum of its proper divisors (374011).

11100002021 is an equidigital number, since it uses as much as digits as its factorization.

11100002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374010.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11100002021 its reverse (12020000111), we get a palindrome (23120002132).

The spelling of 11100002021 in words is "eleven billion, one hundred million, two thousand, twenty-one".