20010112221 has 32 divisors (see below), whose sum is σ = 30743285760. Its totient is φ = 11463177600.

The previous prime is 20010112193. The next prime is 20010112229. The reversal of 20010112221 is 12221101002.

It is not a de Polignac number, because 20010112221 - 2⁷ = 20010112093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010112197 and 20010112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010112229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183456 + ... + 271433.

It is an arithmetic number, because the mean of its divisors is an integer number (960727680).

Almost surely, 2^20010112221 is an apocalyptic number.

It is an amenable number.

20010112221 is a deficient number, since it is larger than the sum of its proper divisors (10733173539).

20010112221 is a wasteful number, since it uses less digits than its factorization.

20010112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454977.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20010112221 its reverse (12221101002), we get a palindrome (32231213223).

It can be divided in two parts, 20010 and 112221, that added together give a palindrome (132231).

The spelling of 20010112221 in words is "twenty billion, ten million, one hundred twelve thousand, two hundred twenty-one".