20110220102001 has 4 divisors (see below), whose sum is σ = 26813626802672. Its totient is φ = 13406813401332.

The previous prime is 20110220101969. The next prime is 20110220102003. The reversal of 20110220102001 is 10020102201102.

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 20110220102001 - 2⁵ = 20110220101969 is a prime.

It is a super-2 number, since 2×20110220102001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20110220102003) 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, 3351703350331 + ... + 3351703350336.

It is an arithmetic number, because the mean of its divisors is an integer number (6703406700668).

Almost surely, 2^{20110220102001} is an apocalyptic number.

It is an amenable number.

20110220102001 is a deficient number, since it is larger than the sum of its proper divisors (6703406700671).

20110220102001 is an equidigital number, since it uses as much as digits as its factorization.

20110220102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6703406700670.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20110220102001 its reverse (10020102201102), we get a palindrome (30130322303103).

The spelling of 20110220102001 in words is "twenty trillion, one hundred ten billion, two hundred twenty million, one hundred two thousand, one".