1001220211001 has 8 divisors (see below), whose sum is σ = 1053925583520. Its totient is φ = 948515795712.

The previous prime is 1001220210997. The next prime is 1001220211009. The reversal of 1001220211001 is 1001120221001.

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 1001220211001 - 2² = 1001220210997 is a prime.

It is a super-2 number, since 2×1001220211001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001220211009) 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, 3109106 + ... + 3415988.

It is an arithmetic number, because the mean of its divisors is an integer number (131740697940).

Almost surely, 2^{1001220211001} is an apocalyptic number.

It is an amenable number.

1001220211001 is a deficient number, since it is larger than the sum of its proper divisors (52705372519).

1001220211001 is a wasteful number, since it uses less digits than its factorization.

1001220211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478615.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1001220211001 its reverse (1001120221001), we get a palindrome (2002340432002).

The spelling of 1001220211001 in words is "one trillion, one billion, two hundred twenty million, two hundred eleven thousand, one".