121220122104 has 64 divisors (see below), whose sum is σ = 344935332000. Its totient is φ = 39421175040.

The previous prime is 121220122103. The next prime is 121220122109. The reversal of 121220122104 is 401221022121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220122103) 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 15 ways as a sum of consecutive naturals, for example, 6835099 + ... + 6852810.

Almost surely, 2^121220122104 is an apocalyptic number.

It is an amenable number.

121220122104 is an abundant number, since it is smaller than the sum of its proper divisors (223715209896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121220122104 is a wasteful number, since it uses less digits than its factorization.

121220122104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13687965 (or 13687955 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121220122104 its reverse (401221022121), we get a palindrome (522441144225).

The spelling of 121220122104 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred four".