20020112221 has 16 divisors (see below), whose sum is σ = 20529936000. Its totient is φ = 19516939200.

The previous prime is 20020112207. The next prime is 20020112257. The reversal of 20020112221 is 12221102002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20020112221 - 2¹³ = 20020104029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020112291) 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, 3262326 + ... + 3268456.

It is an arithmetic number, because the mean of its divisors is an integer number (1283121000).

Almost surely, 2^20020112221 is an apocalyptic number.

It is an amenable number.

20020112221 is a deficient number, since it is larger than the sum of its proper divisors (509823779).

20020112221 is a wasteful number, since it uses less digits than its factorization.

20020112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6660.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20020112221 its reverse (12221102002), we get a palindrome (32241214223).

The spelling of 20020112221 in words is "twenty billion, twenty million, one hundred twelve thousand, two hundred twenty-one".