11213112011021 has 4 divisors (see below), whose sum is σ = 11213125919772. Its totient is φ = 11213098102272.

The previous prime is 11213112010951. The next prime is 11213112011033. The reversal of 11213112011021 is 12011021131211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7879310754121 + 3333801256900 = 2807011^2 + 1825870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11213112011021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213112011081) 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, 5665460 + ... + 7384013.

It is an arithmetic number, because the mean of its divisors is an integer number (2803281479943).

Almost surely, 2^{11213112011021} is an apocalyptic number.

It is an amenable number.

11213112011021 is a deficient number, since it is larger than the sum of its proper divisors (13908751).

11213112011021 is an equidigital number, since it uses as much as digits as its factorization.

11213112011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13908750.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 11213112011021 its reverse (12011021131211), we get a palindrome (23224133142232).

The spelling of 11213112011021 in words is "eleven trillion, two hundred thirteen billion, one hundred twelve million, eleven thousand, twenty-one".