20130201221 has 16 divisors (see below), whose sum is σ = 21832700736. Its totient is φ = 18449928576.

The previous prime is 20130201193. The next prime is 20130201229. The reversal of 20130201221 is 12210203102.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20130201221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20130201196 and 20130201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130201229) 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, 2523986 + ... + 2531948.

It is an arithmetic number, because the mean of its divisors is an integer number (1364543796).

Almost surely, 2^20130201221 is an apocalyptic number.

It is an amenable number.

20130201221 is a deficient number, since it is larger than the sum of its proper divisors (1702499515).

20130201221 is a wasteful number, since it uses less digits than its factorization.

20130201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9332.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 20130201221 its reverse (12210203102), we get a palindrome (32340404323).

The spelling of 20130201221 in words is "twenty billion, one hundred thirty million, two hundred one thousand, two hundred twenty-one".