121222110111220 has 72 divisors (see below), whose sum is σ = 259471674814464. Its totient is φ = 47571855646848.

The previous prime is 121222110111217. The next prime is 121222110111301. The reversal of 121222110111220 is 22111011222121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2065540717 + ... + 2065599403.

It is an arithmetic number, because the mean of its divisors is an integer number (3603773261312).

Almost surely, 2^{121222110111220} is an apocalyptic number.

121222110111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222110111220 is an abundant number, since it is smaller than the sum of its proper divisors (138249564703244).

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

121222110111220 is a wasteful number, since it uses less digits than its factorization.

121222110111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95569 (or 95514 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121222110111220 its reverse (22111011222121), we get a palindrome (143333121333341).

The spelling of 121222110111220 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred ten million, one hundred eleven thousand, two hundred twenty".