1001220210001 has 4 divisors (see below), whose sum is σ = 1092240229104. Its totient is φ = 910200190900.

The previous prime is 1001220209987. The next prime is 1001220210037. The reversal of 1001220210001 is 1000120221001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1001220210001 - 2²⁵ = 1001186655569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001220210001.

It is not an unprimeable number, because it can be changed into a prime (1001220210091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45510009535 + ... + 45510009556.

It is an arithmetic number, because the mean of its divisors is an integer number (273060057276).

Almost surely, 2^{1001220210001} is an apocalyptic number.

1001220210001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1001220210001 is a deficient number, since it is larger than the sum of its proper divisors (91020019103).

1001220210001 is an equidigital number, since it uses as much as digits as its factorization.

1001220210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91020019102.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1001220210001 its reverse (1000120221001), we get a palindrome (2001340431002).

The spelling of 1001220210001 in words is "one trillion, one billion, two hundred twenty million, two hundred ten thousand, one".