11221221222001 has 8 divisors (see below), whose sum is σ = 12824355224960. Its totient is φ = 9618112819008.

The previous prime is 11221221221963. The next prime is 11221221222007. The reversal of 11221221222001 is 10022212212211.

11221221222001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11221221222001 - 2¹³ = 11221221213809 is a prime.

It is a super-3 number, since 3×11221221222001³ (a number of 40 digits) contains 333 as substring.

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 11221221222001.

It is not an unprimeable number, because it can be changed into a prime (11221221222007) 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, 5451336 + ... + 7222153.

It is an arithmetic number, because the mean of its divisors is an integer number (1603044403120).

Almost surely, 2^{11221221222001} is an apocalyptic number.

It is an amenable number.

11221221222001 is a deficient number, since it is larger than the sum of its proper divisors (1603134002959).

11221221222001 is a wasteful number, since it uses less digits than its factorization.

11221221222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12799983.

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

Adding to 11221221222001 its reverse (10022212212211), we get a palindrome (21243433434212).

The spelling of 11221221222001 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, one".