20020211201221 has 32 divisors (see below), whose sum is σ = 25315217141760. Its totient is φ = 15378377481600.

The previous prime is 20020211201209. The next prime is 20020211201321. The reversal of 20020211201221 is 12210211202002.

It is a happy number.

It is not a de Polignac number, because 20020211201221 - 2⁵ = 20020211201189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20020211201195 and 20020211201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020211201321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41082825 + ... + 41567281.

It is an arithmetic number, because the mean of its divisors is an integer number (791100535680).

Almost surely, 2^{20020211201221} is an apocalyptic number.

It is an amenable number.

20020211201221 is a deficient number, since it is larger than the sum of its proper divisors (5295005940539).

20020211201221 is a wasteful number, since it uses less digits than its factorization.

20020211201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492105.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20020211201221 its reverse (12210211202002), we get a palindrome (32230422403223).

The spelling of 20020211201221 in words is "twenty trillion, twenty billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".