11221112001001 has 32 divisors (see below), whose sum is σ = 13576854896640. Its totient is φ = 9069985065600.

The previous prime is 11221112000953. The next prime is 11221112001061. The reversal of 11221112001001 is 10010021112211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11221112001001 - 2¹⁵ = 11221111968233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221112001061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6712960 + ... + 8216206.

It is an arithmetic number, because the mean of its divisors is an integer number (424276715520).

Almost surely, 2^{11221112001001} is an apocalyptic number.

It is an amenable number.

11221112001001 is a deficient number, since it is larger than the sum of its proper divisors (2355742895639).

11221112001001 is a wasteful number, since it uses less digits than its factorization.

11221112001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504165.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11221112001001 its reverse (10010021112211), we get a palindrome (21231133113212).

The spelling of 11221112001001 in words is "eleven trillion, two hundred twenty-one billion, one hundred twelve million, one thousand, one".