202012101221 has 16 divisors (see below), whose sum is σ = 235213524480. Its totient is φ = 169907053680.

The previous prime is 202012101139. The next prime is 202012101223. The reversal of 202012101221 is 122101210202.

It is not a de Polignac number, because 202012101221 - 2¹⁰ = 202012100197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202012101196 and 202012101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202012101223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221195 + ... + 673016.

It is an arithmetic number, because the mean of its divisors is an integer number (14700845280).

Almost surely, 2^202012101221 is an apocalyptic number.

It is an amenable number.

202012101221 is a deficient number, since it is larger than the sum of its proper divisors (33201423259).

202012101221 is an equidigital number, since it uses as much as digits as its factorization.

202012101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894824.

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

Adding to 202012101221 its reverse (122101210202), we get a palindrome (324113311423).

The spelling of 202012101221 in words is "two hundred two billion, twelve million, one hundred one thousand, two hundred twenty-one".