11211000202021 has 4 divisors (see below), whose sum is σ = 11242228615200. Its totient is φ = 11179771788844.

The previous prime is 11211000202019. The next prime is 11211000202069. The reversal of 11211000202021 is 12020200011211.

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 11211000202021 - 2¹ = 11211000202019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211000201992 and 11211000202010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211000200021) 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, 15614206051 + ... + 15614206768.

It is an arithmetic number, because the mean of its divisors is an integer number (2810557153800).

Almost surely, 2^{11211000202021} is an apocalyptic number.

It is an amenable number.

11211000202021 is a deficient number, since it is larger than the sum of its proper divisors (31228413179).

11211000202021 is an equidigital number, since it uses as much as digits as its factorization.

11211000202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31228413178.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11211000202021 its reverse (12020200011211), we get a palindrome (23231200213232).

The spelling of 11211000202021 in words is "eleven trillion, two hundred eleven billion, two hundred two thousand, twenty-one".