20010111221101 has 16 divisors (see below), whose sum is σ = 21076372699200. Its totient is φ = 18945161625600.

The previous prime is 20010111221069. The next prime is 20010111221117. The reversal of 20010111221101 is 10112211101002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20010111221101 - 2⁵ = 20010111221069 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 (20010111221501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450848931 + ... + 450893311.

It is an arithmetic number, because the mean of its divisors is an integer number (1317273293700).

Almost surely, 2^{20010111221101} is an apocalyptic number.

It is an amenable number.

20010111221101 is a deficient number, since it is larger than the sum of its proper divisors (1066261478099).

20010111221101 is a wasteful number, since it uses less digits than its factorization.

20010111221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58620.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20010111221101 its reverse (10112211101002), we get a palindrome (30122322322103).

The spelling of 20010111221101 in words is "twenty trillion, ten billion, one hundred eleven million, two hundred twenty-one thousand, one hundred one".