20120010221 has 16 divisors (see below), whose sum is σ = 21430656000. Its totient is φ = 18823673088.

The previous prime is 20120010217. The next prime is 20120010227. The reversal of 20120010221 is 12201002102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20120010221 - 2² = 20120010217 is a prime.

It is a super-2 number, since 2×20120010221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120010227) 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, 4866071 + ... + 4870203.

It is an arithmetic number, because the mean of its divisors is an integer number (1339416000).

Almost surely, 2^20120010221 is an apocalyptic number.

It is an amenable number.

20120010221 is a deficient number, since it is larger than the sum of its proper divisors (1310645779).

20120010221 is a wasteful number, since it uses less digits than its factorization.

20120010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5788.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20120010221 its reverse (12201002102), we get a palindrome (32321012323).

The spelling of 20120010221 in words is "twenty billion, one hundred twenty million, ten thousand, two hundred twenty-one".