1001211122001 has 8 divisors (see below), whose sum is σ = 1334998124064. Its totient is φ = 667449100640.

The previous prime is 1001211121997. The next prime is 1001211122003. The reversal of 1001211122001 is 1002211121001.

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 1001211122001 - 2² = 1001211121997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001211122003) 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 7 ways as a sum of consecutive naturals, for example, 6151455 + ... + 6312116.

It is an arithmetic number, because the mean of its divisors is an integer number (166874765508).

Almost surely, 2^{1001211122001} is an apocalyptic number.

It is an amenable number.

1001211122001 is a deficient number, since it is larger than the sum of its proper divisors (333787002063).

1001211122001 is a wasteful number, since it uses less digits than its factorization.

1001211122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12490351.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1001211122001 its reverse (1002211121001), we get a palindrome (2003422243002).

The spelling of 1001211122001 in words is "one trillion, one billion, two hundred eleven million, one hundred twenty-two thousand, one".