20020020011221 has 8 divisors (see below), whose sum is σ = 20078871567104. Its totient is φ = 19961210784240.

The previous prime is 20020020011219. The next prime is 20020020011279. The reversal of 20020020011221 is 12211002002002.

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 20020020011221 - 2¹ = 20020020011219 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 (20020020018221) 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, 9634785 + ... + 11526886.

It is an arithmetic number, because the mean of its divisors is an integer number (2509858945888).

Almost surely, 2^{20020020011221} is an apocalyptic number.

It is an amenable number.

20020020011221 is a deficient number, since it is larger than the sum of its proper divisors (58851555883).

20020020011221 is a wasteful number, since it uses less digits than its factorization.

20020020011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21164451.

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

Adding to 20020020011221 its reverse (12211002002002), we get a palindrome (32231022013223).

The spelling of 20020020011221 in words is "twenty trillion, twenty billion, twenty million, eleven thousand, two hundred twenty-one".