121242122 has 4 divisors (see below), whose sum is σ = 181863186. Its totient is φ = 60621060.

The previous prime is 121242101. The next prime is 121242137. The reversal of 121242122 is 221242121.

It is a Cunningham number, because it is equal to 11011²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 1 = 11011^2 + 1^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121242122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30310529 + ... + 30310532.

Almost surely, 2^121242122 is an apocalyptic number.

121242122 is a deficient number, since it is larger than the sum of its proper divisors (60621064).

121242122 is an equidigital number, since it uses as much as digits as its factorization.

121242122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60621063.

The product of its digits is 128, while the sum is 17.

The square root of 121242122 is about 11011.0000454091. Note that the first 4 decimals coincide. The cubic root of 121242122 is about 494.9384299164.

Adding to 121242122 its reverse (221242121), we get a palindrome (342484243).

Subtracting 121242122 from its reverse (221242121), we obtain a palindrome (99999999).

It can be divided in two parts, 1212 and 42122, that added together give a palindrome (43334).

The spelling of 121242122 in words is "one hundred twenty-one million, two hundred forty-two thousand, one hundred twenty-two".