11212202020021 has 4 divisors (see below), whose sum is σ = 11212209943200. Its totient is φ = 11212194096844.

The previous prime is 11212202020001. The next prime is 11212202020037. The reversal of 11212202020021 is 12002020221211.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11212202020021 - 2²⁷ = 11212067802293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212202019977 and 11212202020004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212202020001) 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, 1194811 + ... + 4883848.

It is an arithmetic number, because the mean of its divisors is an integer number (2803052485800).

Almost surely, 2^{11212202020021} is an apocalyptic number.

It is an amenable number.

11212202020021 is a deficient number, since it is larger than the sum of its proper divisors (7923179).

11212202020021 is an equidigital number, since it uses as much as digits as its factorization.

11212202020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7923178.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11212202020021 its reverse (12002020221211), we get a palindrome (23214222241232).

The spelling of 11212202020021 in words is "eleven trillion, two hundred twelve billion, two hundred two million, twenty thousand, twenty-one".