11212202212021 has 4 divisors (see below), whose sum is σ = 11212286482444. Its totient is φ = 11212117941600.

The previous prime is 11212202211971. The next prime is 11212202212061. The reversal of 11212202212021 is 12021220221211.

11212202212021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8274539902500 + 2937662309521 = 2876550^2 + 1713961^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212202212021 - 2¹⁵ = 11212202179253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11212202212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212202212061) 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, 41935320 + ... + 42201841.

It is an arithmetic number, because the mean of its divisors is an integer number (2803071620611).

Almost surely, 2^{11212202212021} is an apocalyptic number.

It is an amenable number.

11212202212021 is a deficient number, since it is larger than the sum of its proper divisors (84270423).

11212202212021 is an equidigital number, since it uses as much as digits as its factorization.

11212202212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84270422.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11212202212021 its reverse (12021220221211), we get a palindrome (23233422433232).

The spelling of 11212202212021 in words is "eleven trillion, two hundred twelve billion, two hundred two million, two hundred twelve thousand, twenty-one".