1001122221101 has 16 divisors (see below), whose sum is σ = 1034273210880. Its totient is φ = 968538740400.

The previous prime is 1001122221091. The next prime is 1001122221119. The reversal of 1001122221101 is 1011222211001.

It is a cyclic number.

It is not a de Polignac number, because 1001122221101 - 2¹⁸ = 1001121958957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001122221901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4034120 + ... + 4275086.

It is an arithmetic number, because the mean of its divisors is an integer number (64642075680).

Almost surely, 2^{1001122221101} is an apocalyptic number.

It is an amenable number.

1001122221101 is a deficient number, since it is larger than the sum of its proper divisors (33150989779).

1001122221101 is a wasteful number, since it uses less digits than its factorization.

1001122221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242144.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1001122221101 its reverse (1011222211001), we get a palindrome (2012344432102).

The spelling of 1001122221101 in words is "one trillion, one billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred one".