20210100201221 has 8 divisors (see below), whose sum is σ = 23097804533760. Its totient is φ = 17322532658928.

The previous prime is 20210100201211. The next prime is 20210100201257. The reversal of 20210100201221 is 12210200101202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20210100201221 - 2³⁰ = 20209026459397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20210100201196 and 20210100201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210100201211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33880766 + ... + 34472111.

It is an arithmetic number, because the mean of its divisors is an integer number (2887225566720).

Almost surely, 2^{20210100201221} is an apocalyptic number.

It is an amenable number.

20210100201221 is a deficient number, since it is larger than the sum of its proper divisors (2887704332539).

20210100201221 is an equidigital number, since it uses as much as digits as its factorization.

20210100201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68395123.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20210100201221 its reverse (12210200101202), we get a palindrome (32420300302423).

The spelling of 20210100201221 in words is "twenty trillion, two hundred ten billion, one hundred million, two hundred one thousand, two hundred twenty-one".