11222000001221 has 4 divisors (see below), whose sum is σ = 11228272781100. Its totient is φ = 11215727221344.

The previous prime is 11222000001197. The next prime is 11222000001239. The reversal of 11222000001221 is 12210000022211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6549965304100 + 4672034697121 = 2559290^2 + 2161489^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222000001221 - 2⁴² = 6823953490117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222000001196 and 11222000001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222000001281) 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, 3136387256 + ... + 3136390833.

It is an arithmetic number, because the mean of its divisors is an integer number (2807068195275).

Almost surely, 2^{11222000001221} is an apocalyptic number.

It is an amenable number.

11222000001221 is a deficient number, since it is larger than the sum of its proper divisors (6272779879).

11222000001221 is an equidigital number, since it uses as much as digits as its factorization.

11222000001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6272779878.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11222000001221 its reverse (12210000022211), we get a palindrome (23432000023432).

The spelling of 11222000001221 in words is "eleven trillion, two hundred twenty-two billion, one thousand, two hundred twenty-one".