202020210021101 has 4 divisors (see below), whose sum is σ = 202020583505052. Its totient is φ = 202019836537152.

The previous prime is 202020210021023. The next prime is 202020210021127. The reversal of 202020210021101 is 101120012020202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7626931656100 + 194393278365001 = 2761690^2 + 13942499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202020210021101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020210021181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185929436 + ... + 187012821.

It is an arithmetic number, because the mean of its divisors is an integer number (50505145876263).

Almost surely, 2^{202020210021101} is an apocalyptic number.

It is an amenable number.

202020210021101 is a deficient number, since it is larger than the sum of its proper divisors (373483951).

202020210021101 is an equidigital number, since it uses as much as digits as its factorization.

202020210021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373483950.

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

Adding to 202020210021101 its reverse (101120012020202), we get a palindrome (303140222041303).

The spelling of 202020210021101 in words is "two hundred two trillion, twenty billion, two hundred ten million, twenty-one thousand, one hundred one".