202221101 has 4 divisors (see below), whose sum is σ = 202273692. Its totient is φ = 202168512.

The previous prime is 202221079. The next prime is 202221109. The reversal of 202221101 is 101122202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101122202 = 2 ⋅50561101.

It can be written as a sum of positive squares in 2 ways, for example, as 137499076 + 64722025 = 11726^2 + 8045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202221101 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 (202221109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20030 + ... + 28383.

It is an arithmetic number, because the mean of its divisors is an integer number (50568423).

Almost surely, 2^202221101 is an apocalyptic number.

It is an amenable number.

202221101 is a deficient number, since it is larger than the sum of its proper divisors (52591).

202221101 is an equidigital number, since it uses as much as digits as its factorization.

202221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52590.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 202221101 is about 14220.4465822983. The cubic root of 202221101 is about 586.9604290602.

Adding to 202221101 its reverse (101122202), we get a palindrome (303343303).

The spelling of 202221101 in words is "two hundred two million, two hundred twenty-one thousand, one hundred one".