202021101221 has 8 divisors (see below), whose sum is σ = 202290385344. Its totient is φ = 201751921440.

The previous prime is 202021101169. The next prime is 202021101229. The reversal of 202021101221 is 122101120202.

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

It is a cyclic number.

It is not a de Polignac number, because 202021101221 - 2¹⁸ = 202020839077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202021101196 and 202021101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021101229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324016 + ... + 4370486.

It is an arithmetic number, because the mean of its divisors is an integer number (25286298168).

Almost surely, 2^202021101221 is an apocalyptic number.

It is an amenable number.

202021101221 is a deficient number, since it is larger than the sum of its proper divisors (269284123).

202021101221 is an equidigital number, since it uses as much as digits as its factorization.

202021101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52171.

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

Adding to 202021101221 its reverse (122101120202), we get a palindrome (324122221423).

The spelling of 202021101221 in words is "two hundred two billion, twenty-one million, one hundred one thousand, two hundred twenty-one".