202102201021 has 8 divisors (see below), whose sum is σ = 231577012224. Its totient is φ = 172778156880.

The previous prime is 202102201003. The next prime is 202102201027. The reversal of 202102201021 is 120102201202.

It is a happy number.

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

It is not a de Polignac number, because 202102201021 - 2¹³ = 202102192829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202102200992 and 202102201010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102201027) 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, 37688890 + ... + 37694251.

It is an arithmetic number, because the mean of its divisors is an integer number (28947126528).

Almost surely, 2^202102201021 is an apocalyptic number.

It is an amenable number.

202102201021 is a deficient number, since it is larger than the sum of its proper divisors (29474811203).

202102201021 is an equidigital number, since it uses as much as digits as its factorization.

202102201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75383531.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202102201021 its reverse (120102201202), we get a palindrome (322204402223).

The spelling of 202102201021 in words is "two hundred two billion, one hundred two million, two hundred one thousand, twenty-one".