11202021212021 has 4 divisors (see below), whose sum is σ = 11202039708192. Its totient is φ = 11202002715852.

The previous prime is 11202021211981. The next prime is 11202021212027. The reversal of 11202021212021 is 12021212020211.

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 11202021212021 - 2²⁶ = 11201954103157 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 (11202021212027) 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, 8307755 + ... + 9561528.

It is an arithmetic number, because the mean of its divisors is an integer number (2800509927048).

Almost surely, 2^{11202021212021} is an apocalyptic number.

It is an amenable number.

11202021212021 is a deficient number, since it is larger than the sum of its proper divisors (18496171).

11202021212021 is an equidigital number, since it uses as much as digits as its factorization.

11202021212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18496170.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 11202021212021 its reverse (12021212020211), we get a palindrome (23223233232232).

The spelling of 11202021212021 in words is "eleven trillion, two hundred two billion, twenty-one million, two hundred twelve thousand, twenty-one".