11022022011221 has 16 divisors (see below), whose sum is σ = 12094224727536. Its totient is φ = 9981882533376.

The previous prime is 11022022011211. The next prime is 11022022011241. The reversal of 11022022011221 is 12211022022011.

It can be written as a sum of positive squares in 8 ways, for example, as 133143982321 + 10888878028900 = 364889^2 + 3299830^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11022022011221 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 11022022011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022022011211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22252961 + ... + 22742873.

It is an arithmetic number, because the mean of its divisors is an integer number (755889045471).

Almost surely, 2^{11022022011221} is an apocalyptic number.

It is an amenable number.

11022022011221 is a deficient number, since it is larger than the sum of its proper divisors (1072202716315).

11022022011221 is a wasteful number, since it uses less digits than its factorization.

11022022011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522632.

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

Adding to 11022022011221 its reverse (12211022022011), we get a palindrome (23233044033232).

The spelling of 11022022011221 in words is "eleven trillion, twenty-two billion, twenty-two million, eleven thousand, two hundred twenty-one".