11221111100001 has 32 divisors (see below), whose sum is σ = 16928708823936. Its totient is φ = 6551357760000.

The previous prime is 11221111099981. The next prime is 11221111100113. The reversal of 11221111100001 is 10000111112211.

It is not a de Polignac number, because 11221111100001 - 2⁵ = 11221111099969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221111100001.

It is not an unprimeable number, because it can be changed into a prime (11221111100201) 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, 45372220 + ... + 45618861.

It is an arithmetic number, because the mean of its divisors is an integer number (529022150748).

Almost surely, 2^{11221111100001} is an apocalyptic number.

11221111100001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11221111100001 is a deficient number, since it is larger than the sum of its proper divisors (5707597723935).

11221111100001 is a wasteful number, since it uses less digits than its factorization.

11221111100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90991233.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11221111100001 its reverse (10000111112211), we get a palindrome (21221222212212).

The spelling of 11221111100001 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thousand, one".