121022220122 has 4 divisors (see below), whose sum is σ = 181533330186. Its totient is φ = 60511110060.

The previous prime is 121022220107. The next prime is 121022220139. The reversal of 121022220122 is 221022220121.

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: 221022220121 = 347 ⋅636951643.

It can be written as a sum of positive squares in only one way, i.e., 99566122681 + 21456097441 = 315541^2 + 146479^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121022220122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30255555029 + ... + 30255555032.

Almost surely, 2^121022220122 is an apocalyptic number.

121022220122 is a deficient number, since it is larger than the sum of its proper divisors (60511110064).

121022220122 is an equidigital number, since it uses as much as digits as its factorization.

121022220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60511110063.

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

Adding to 121022220122 its reverse (221022220121), we get a palindrome (342044440243).

Subtracting 121022220122 from its reverse (221022220121), we obtain a palindrome (99999999999).

The spelling of 121022220122 in words is "one hundred twenty-one billion, twenty-two million, two hundred twenty thousand, one hundred twenty-two".