20013221030111 has 4 divisors (see below), whose sum is σ = 20013235177512. Its totient is φ = 20013206882712.

The previous prime is 20013221030107. The next prime is 20013221030119. The reversal of 20013221030111 is 11103012231002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20013221030111 - 2² = 20013221030107 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 20013221030111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013221030119) 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, 4682276 + ... + 7870841.

It is an arithmetic number, because the mean of its divisors is an integer number (5003308794378).

Almost surely, 2^{20013221030111} is an apocalyptic number.

20013221030111 is a deficient number, since it is larger than the sum of its proper divisors (14147401).

20013221030111 is a wasteful number, since it uses less digits than its factorization.

20013221030111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14147400.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20013221030111 its reverse (11103012231002), we get a palindrome (31116233261113).

The spelling of 20013221030111 in words is "twenty trillion, thirteen billion, two hundred twenty-one million, thirty thousand, one hundred eleven".