20201012221221 has 32 divisors (see below), whose sum is σ = 32233040112000. Its totient is φ = 12430040229504.

The previous prime is 20201012221177. The next prime is 20201012221253. The reversal of 20201012221221 is 12212221010202.

It is a happy number.

20201012221221 is a `hidden beast` number, since 20 + 201 + 0 + 1 + 2 + 221 + 221 = 666.

It is not a de Polignac number, because 20201012221221 - 2¹¹ = 20201012219173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20201012221194 and 20201012221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201012221021) 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, 107550 + ... + 6357168.

It is an arithmetic number, because the mean of its divisors is an integer number (1007282503500).

Almost surely, 2^{20201012221221} is an apocalyptic number.

It is an amenable number.

20201012221221 is a deficient number, since it is larger than the sum of its proper divisors (12032027890779).

20201012221221 is a wasteful number, since it uses less digits than its factorization.

20201012221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258850 (or 6258844 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20201012221221 its reverse (12212221010202), we get a palindrome (32413233231423).

The spelling of 20201012221221 in words is "twenty trillion, two hundred one billion, twelve million, two hundred twenty-one thousand, two hundred twenty-one".