20113311221101 has 4 divisors (see below), whose sum is σ = 22986641395552. Its totient is φ = 17239981046652.

The previous prime is 20113311221089. The next prime is 20113311221123. The reversal of 20113311221101 is 10112211331102.

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 20113311221101 - 2¹⁹ = 20113310696813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113311221141) 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, 1436665087215 + ... + 1436665087228.

It is an arithmetic number, because the mean of its divisors is an integer number (5746660348888).

Almost surely, 2^{20113311221101} is an apocalyptic number.

It is an amenable number.

20113311221101 is a deficient number, since it is larger than the sum of its proper divisors (2873330174451).

20113311221101 is an equidigital number, since it uses as much as digits as its factorization.

20113311221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2873330174450.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 20113311221101 its reverse (10112211331102), we get a palindrome (30225522552203).

The spelling of 20113311221101 in words is "twenty trillion, one hundred thirteen billion, three hundred eleven million, two hundred twenty-one thousand, one hundred one".