11001220021001 has 4 divisors (see below), whose sum is σ = 12572822881152. Its totient is φ = 9429617160852.

The previous prime is 11001220020977. The next prime is 11001220021019. The reversal of 11001220021001 is 10012002210011.

11001220021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11001220021001 - 2²⁶ = 11001152912137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11001220021061) 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, 785801430065 + ... + 785801430078.

It is an arithmetic number, because the mean of its divisors is an integer number (3143205720288).

Almost surely, 2^{11001220021001} is an apocalyptic number.

It is an amenable number.

11001220021001 is a deficient number, since it is larger than the sum of its proper divisors (1571602860151).

11001220021001 is an equidigital number, since it uses as much as digits as its factorization.

11001220021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571602860150.

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

Adding to 11001220021001 its reverse (10012002210011), we get a palindrome (21013222231012).

The spelling of 11001220021001 in words is "eleven trillion, one billion, two hundred twenty million, twenty-one thousand, one".