11022021221221 has 8 divisors (see below), whose sum is σ = 11029946077304. Its totient is φ = 11014099035840.

The previous prime is 11022021221153. The next prime is 11022021221257. The reversal of 11022021221221 is 12212212022011.

It can be written as a sum of positive squares in 4 ways, for example, as 4535881917121 + 6486139304100 = 2129761^2 + 2546790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11022021221221 - 2²⁹ = 11021484350309 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 (11022021221921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7626295 + ... + 8955691.

It is an arithmetic number, because the mean of its divisors is an integer number (1378743259663).

Almost surely, 2^{11022021221221} is an apocalyptic number.

It is an amenable number.

11022021221221 is a deficient number, since it is larger than the sum of its proper divisors (7924856083).

11022021221221 is a wasteful number, since it uses less digits than its factorization.

11022021221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335351.

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

Adding to 11022021221221 its reverse (12212212022011), we get a palindrome (23234233243232).

The spelling of 11022021221221 in words is "eleven trillion, twenty-two billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-one".