122202121 has 4 divisors (see below), whose sum is σ = 122241744. Its totient is φ = 122162500.

The previous prime is 122202109. The next prime is 122202131. The reversal of 122202121 is 121202221.

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: 121202221 = 7 ⋅17314603.

It is a cyclic number.

It is not a de Polignac number, because 122202121 - 2¹⁹ = 121677833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122202131) 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, 14755 + ... + 21496.

It is an arithmetic number, because the mean of its divisors is an integer number (30560436).

Almost surely, 2^122202121 is an apocalyptic number.

It is an amenable number.

122202121 is a deficient number, since it is larger than the sum of its proper divisors (39623).

122202121 is an equidigital number, since it uses as much as digits as its factorization.

122202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39622.

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

The square root of 122202121 is about 11054.5068184881. The cubic root of 122202121 is about 496.2413099676.

Adding to 122202121 its reverse (121202221), we get a palindrome (243404342).

It can be divided in two parts, 12220 and 2121, that added together give a palindrome (14341).

The spelling of 122202121 in words is "one hundred twenty-two million, two hundred two thousand, one hundred twenty-one".