121220111220204 has 48 divisors (see below), whose sum is σ = 282929637070080. Its totient is φ = 40394888790720.

The previous prime is 121220111220199. The next prime is 121220111220217. The reversal of 121220111220204 is 402022111022121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1663498282 + ... + 1663571150.

It is an arithmetic number, because the mean of its divisors is an integer number (5894367438960).

Almost surely, 2^{121220111220204} is an apocalyptic number.

It is an amenable number.

121220111220204 is an abundant number, since it is smaller than the sum of its proper divisors (161709525849876).

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

121220111220204 is a wasteful number, since it uses less digits than its factorization.

121220111220204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111510 (or 111508 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121220111220204 its reverse (402022111022121), we get a palindrome (523242222242325).

The spelling of 121220111220204 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, two hundred four".