121220012122 has 48 divisors (see below), whose sum is σ = 217636624800. Its totient is φ = 50399949600.

The previous prime is 121220012113. The next prime is 121220012129. The reversal of 121220012122 is 221210022121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121220012096 and 121220012105.

It is not an unprimeable number, because it can be changed into a prime (121220012129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321204 + ... + 587887.

It is an arithmetic number, because the mean of its divisors is an integer number (4534096350).

Almost surely, 2^121220012122 is an apocalyptic number.

121220012122 is a deficient number, since it is larger than the sum of its proper divisors (96416612678).

121220012122 is a wasteful number, since it uses less digits than its factorization.

121220012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909163 (or 909152 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121220012122 its reverse (221210022121), we get a palindrome (342430034243).

Subtracting 121220012122 from its reverse (221210022121), we obtain a palindrome (99990009999).

It can be divided in two parts, 1212200 and 12122, that multiplied together give a square (14694288400 = 121220²).

The spelling of 121220012122 in words is "one hundred twenty-one billion, two hundred twenty million, twelve thousand, one hundred twenty-two".