1111221211001 has 8 divisors (see below), whose sum is σ = 1213834288608. Its totient is φ = 1008873628000.

The previous prime is 1111221210991. The next prime is 1111221211039. The reversal of 1111221211001 is 1001121221111.

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 1111221211001 - 2¹⁴ = 1111221194617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111221211501) 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, 66364895 + ... + 66381636.

It is an arithmetic number, because the mean of its divisors is an integer number (151729286076).

Almost surely, 2^{1111221211001} is an apocalyptic number.

1111221211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1111221211001 is a deficient number, since it is larger than the sum of its proper divisors (102613077607).

1111221211001 is a wasteful number, since it uses less digits than its factorization.

1111221211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132747303.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1111221211001 its reverse (1001121221111), we get a palindrome (2112342432112).

The spelling of 1111221211001 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred eleven thousand, one".