1001022211001 has 4 divisors (see below), whose sum is σ = 1003212632052. Its totient is φ = 998831789952.

The previous prime is 1001022210983. The next prime is 1001022211043. The reversal of 1001022211001 is 1001122201001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 657129103225 + 343893107776 = 810635^2 + 586424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001022211001 - 2¹⁴ = 1001022194617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001022213001) 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 3 ways as a sum of consecutive naturals, for example, 1095209840 + ... + 1095210753.

It is an arithmetic number, because the mean of its divisors is an integer number (250803158013).

Almost surely, 2^{1001022211001} is an apocalyptic number.

It is an amenable number.

1001022211001 is a deficient number, since it is larger than the sum of its proper divisors (2190421051).

1001022211001 is an equidigital number, since it uses as much as digits as its factorization.

1001022211001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190421050.

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

Adding to 1001022211001 its reverse (1001122201001), we get a palindrome (2002144412002).

The spelling of 1001022211001 in words is "one trillion, one billion, twenty-two million, two hundred eleven thousand, one".