20130112221 has 4 divisors (see below), whose sum is σ = 26840149632. Its totient is φ = 13420074812.

The previous prime is 20130112217. The next prime is 20130112273. The reversal of 20130112221 is 12221103102.

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 a cyclic number.

It is not a de Polignac number, because 20130112221 - 2² = 20130112217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20130112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130112021) 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, 3355018701 + ... + 3355018706.

It is an arithmetic number, because the mean of its divisors is an integer number (6710037408).

Almost surely, 2^20130112221 is an apocalyptic number.

It is an amenable number.

20130112221 is a deficient number, since it is larger than the sum of its proper divisors (6710037411).

20130112221 is an equidigital number, since it uses as much as digits as its factorization.

20130112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710037410.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20130112221 its reverse (12221103102), we get a palindrome (32351215323).

The spelling of 20130112221 in words is "twenty billion, one hundred thirty million, one hundred twelve thousand, two hundred twenty-one".