11000022211221 has 16 divisors (see below), whose sum is σ = 14843607839424. Its totient is φ = 7244894795264.

The previous prime is 11000022211133. The next prime is 11000022211271. The reversal of 11000022211221 is 12211222000011.

It is a cyclic number.

It is not a de Polignac number, because 11000022211221 - 2¹⁰ = 11000022210197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11000022211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11000022211271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20732965 + ... + 21256901.

It is an arithmetic number, because the mean of its divisors is an integer number (927725489964).

Almost surely, 2^{11000022211221} is an apocalyptic number.

It is an amenable number.

11000022211221 is a deficient number, since it is larger than the sum of its proper divisors (3843585628203).

11000022211221 is an equidigital number, since it uses as much as digits as its factorization.

11000022211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608340.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11000022211221 its reverse (12211222000011), we get a palindrome (23211244211232).

It can be divided in two parts, 110000 and 22211221, that added together give a triangular number (22321221 = T₆₆₈₁).

The spelling of 11000022211221 in words is "eleven trillion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".