121111011220220 has 48 divisors (see below), whose sum is σ = 290762706984960. Its totient is φ = 41510020981824.

The previous prime is 121111011220211. The next prime is 121111011220321. The reversal of 121111011220220 is 22022110111121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142849724 + ... + 143695043.

It is an arithmetic number, because the mean of its divisors is an integer number (6057556395520).

Almost surely, 2^{121111011220220} is an apocalyptic number.

121111011220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121111011220220 is an abundant number, since it is smaller than the sum of its proper divisors (169651695764740).

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

121111011220220 is a wasteful number, since it uses less digits than its factorization.

121111011220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286547802 (or 286547800 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121111011220220 its reverse (22022110111121), we get a palindrome (143133121331341).

The spelling of 121111011220220 in words is "one hundred twenty-one trillion, one hundred eleven billion, eleven million, two hundred twenty thousand, two hundred twenty".