20110101331221 has 48 divisors (see below), whose sum is σ = 33278276828160. Its totient is φ = 12033662350320.

The previous prime is 20110101331217. The next prime is 20110101331273. The reversal of 20110101331221 is 12213310101102.

20110101331221 is a `hidden beast` number, since 2 + 0 + 1 + 10 + 101 + 331 + 221 = 666.

It is not a de Polignac number, because 20110101331221 - 2² = 20110101331217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20110101331194 and 20110101331203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110001331221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47405415 + ... + 47827748.

It is an arithmetic number, because the mean of its divisors is an integer number (693297433920).

Almost surely, 2^{20110101331221} is an apocalyptic number.

It is an amenable number.

20110101331221 is a deficient number, since it is larger than the sum of its proper divisors (13168175496939).

20110101331221 is an equidigital number, since it uses as much as digits as its factorization.

20110101331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95233268 (or 95233256 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 20110101331221 its reverse (12213310101102), we get a palindrome (32323411432323).

The spelling of 20110101331221 in words is "twenty trillion, one hundred ten billion, one hundred one million, three hundred thirty-one thousand, two hundred twenty-one".