121220112122 has 8 divisors (see below), whose sum is σ = 182235136500. Its totient is φ = 60475066624.

The previous prime is 121220112109. The next prime is 121220112151. The reversal of 121220112122 is 221211022121.

It can be written as a sum of positive squares in 2 ways, for example, as 111501898561 + 9718213561 = 333919^2 + 98581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121220112122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67493597 + ... + 67495392.

Almost surely, 2^121220112122 is an apocalyptic number.

121220112122 is a deficient number, since it is larger than the sum of its proper divisors (61015024378).

121220112122 is a wasteful number, since it uses less digits than its factorization.

121220112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134989440.

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

Adding to 121220112122 its reverse (221211022121), we get a palindrome (342431134243).

Subtracting 121220112122 from its reverse (221211022121), we obtain a palindrome (99990909999).

The spelling of 121220112122 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, one hundred twenty-two".