121212120122 has 4 divisors (see below), whose sum is σ = 181818180186. Its totient is φ = 60606060060.

The previous prime is 121212120103. The next prime is 121212120167. The reversal of 121212120122 is 221021212121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221021212121 = 73483 ⋅3007787.

It can be written as a sum of positive squares in only one way, i.e., 111750472681 + 9461647441 = 334291^2 + 97271^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121212120122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30303030029 + ... + 30303030032.

Almost surely, 2^121212120122 is an apocalyptic number.

121212120122 is a deficient number, since it is larger than the sum of its proper divisors (60606060064).

121212120122 is an equidigital number, since it uses as much as digits as its factorization.

121212120122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60606060063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121212120122 its reverse (221021212121), we get a palindrome (342233332243).

The spelling of 121212120122 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-two".