11213441021 has 4 divisors (see below), whose sum is σ = 11213748000. Its totient is φ = 11213134044.

The previous prime is 11213440949. The next prime is 11213441023. The reversal of 11213441021 is 12014431211.

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 11213441021 - 2¹⁴ = 11213424637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11213440984 and 11213441002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213441023) 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, 89921 + ... + 174678.

It is an arithmetic number, because the mean of its divisors is an integer number (2803437000).

Almost surely, 2^11213441021 is an apocalyptic number.

It is an amenable number.

11213441021 is a deficient number, since it is larger than the sum of its proper divisors (306979).

11213441021 is an equidigital number, since it uses as much as digits as its factorization.

11213441021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306978.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11213441021 its reverse (12014431211), we get a palindrome (23227872232).

The spelling of 11213441021 in words is "eleven billion, two hundred thirteen million, four hundred forty-one thousand, twenty-one".