121121220122220 has 96 divisors (see below), whose sum is σ = 341422899249600. Its totient is φ = 32081526845440.

The previous prime is 121121220122207. The next prime is 121121220122237. The reversal of 121121220122220 is 22221022121121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514763800 + ... + 514999040.

It is an arithmetic number, because the mean of its divisors is an integer number (3556488533850).

Almost surely, 2^{121121220122220} is an apocalyptic number.

121121220122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121121220122220 is an abundant number, since it is smaller than the sum of its proper divisors (220301679127380).

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

121121220122220 is a wasteful number, since it uses less digits than its factorization.

121121220122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292995 (or 292993 counting only the distinct ones).

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

Adding to 121121220122220 its reverse (22221022121121), we get a palindrome (143342242243341).

The spelling of 121121220122220 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-two thousand, two hundred twenty".