11211022222021 has 32 divisors (see below), whose sum is σ = 12671612663040. Its totient is φ = 9855233224704.

The previous prime is 11211022222013. The next prime is 11211022222039. The reversal of 11211022222021 is 12022222011211.

It is a cyclic number.

It is not a de Polignac number, because 11211022222021 - 2³ = 11211022222013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 11211022222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211022222051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58214736 + ... + 58406998.

It is an arithmetic number, because the mean of its divisors is an integer number (395987895720).

Almost surely, 2^{11211022222021} is an apocalyptic number.

It is an amenable number.

11211022222021 is a deficient number, since it is larger than the sum of its proper divisors (1460590441019).

11211022222021 is a wasteful number, since it uses less digits than its factorization.

11211022222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194845.

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

Adding to 11211022222021 its reverse (12022222011211), we get a palindrome (23233244233232).

The spelling of 11211022222021 in words is "eleven trillion, two hundred eleven billion, twenty-two million, two hundred twenty-two thousand, twenty-one".