20010210221221 has 16 divisors (see below), whose sum is σ = 22303107083520. Its totient is φ = 17796601903680.

The previous prime is 20010210221213. The next prime is 20010210221249. The reversal of 20010210221221 is 12212201201002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20010210221221 - 2³ = 20010210221213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20010210221195 and 20010210221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010610221221) 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, 6865446 + ... + 9335671.

It is an arithmetic number, because the mean of its divisors is an integer number (1393944192720).

Almost surely, 2^{20010210221221} is an apocalyptic number.

It is an amenable number.

20010210221221 is a deficient number, since it is larger than the sum of its proper divisors (2292896862299).

20010210221221 is a wasteful number, since it uses less digits than its factorization.

20010210221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16203564.

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

Adding to 20010210221221 its reverse (12212201201002), we get a palindrome (32222411422223).

The spelling of 20010210221221 in words is "twenty trillion, ten billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".