20130212221 has 8 divisors (see below), whose sum is σ = 23799265920. Its totient is φ = 16659485808.

The previous prime is 20130212213. The next prime is 20130212281. The reversal of 20130212221 is 12221203102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20130212221 - 2³ = 20130212213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20130212195 and 20130212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130212281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49581601 + ... + 49582006.

It is an arithmetic number, because the mean of its divisors is an integer number (2974908240).

Almost surely, 2^20130212221 is an apocalyptic number.

It is an amenable number.

20130212221 is a deficient number, since it is larger than the sum of its proper divisors (3669053699).

20130212221 is an equidigital number, since it uses as much as digits as its factorization.

20130212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99163643.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20130212221 its reverse (12221203102), we get a palindrome (32351415323).

The spelling of 20130212221 in words is "twenty billion, one hundred thirty million, two hundred twelve thousand, two hundred twenty-one".