201222101 has 4 divisors (see below), whose sum is σ = 209970912. Its totient is φ = 192473292.

The previous prime is 201222067. The next prime is 201222121. The reversal of 201222101 is 101222102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101222102 = 2 ⋅50611051.

It is a de Polignac number, because none of the positive numbers 2^k-201222101 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 (201222121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4374371 + ... + 4374416.

It is an arithmetic number, because the mean of its divisors is an integer number (52492728).

Almost surely, 2^201222101 is an apocalyptic number.

It is an amenable number.

201222101 is a deficient number, since it is larger than the sum of its proper divisors (8748811).

201222101 is an equidigital number, since it uses as much as digits as its factorization.

201222101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8748810.

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

The square root of 201222101 is about 14185.2776144847. The cubic root of 201222101 is about 585.9922780067.

Adding to 201222101 its reverse (101222102), we get a palindrome (302444203).

Subtracting from 201222101 its reverse (101222102), we obtain a palindrome (99999999).

The spelling of 201222101 in words is "two hundred one million, two hundred twenty-two thousand, one hundred one".