20011103211001 has 6 divisors (see below), whose sum is σ = 23278222102650. Its totient is φ = 17152374180816.

The previous prime is 20011103210929. The next prime is 20011103211061. The reversal of 20011103211001 is 10011230111002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13462852518976 + 6548250692025 = 3669176^2 + 2558955^2 .

It is not a de Polignac number, because 20011103211001 - 2¹³ = 20011103202809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011103211061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204194930676 + ... + 204194930773.

It is an arithmetic number, because the mean of its divisors is an integer number (3879703683775).

Almost surely, 2^{20011103211001} is an apocalyptic number.

It is an amenable number.

20011103211001 is a deficient number, since it is larger than the sum of its proper divisors (3267118891649).

20011103211001 is an equidigital number, since it uses as much as digits as its factorization.

20011103211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408389861463 (or 408389861456 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20011103211001 its reverse (10011230111002), we get a palindrome (30022333322003).

The spelling of 20011103211001 in words is "twenty trillion, eleven billion, one hundred three million, two hundred eleven thousand, one".