121100220100220 has 48 divisors (see below), whose sum is σ = 260258284440000. Its totient is φ = 47319687959040.

The previous prime is 121100220100219. The next prime is 121100220100259. The reversal of 121100220100220 is 22001022001121.

It is a junction number, because it is equal to n+sod(n) for n = 121100220100195 and 121100220100204.

It is a congruent number.

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, 391046345 + ... + 391355904.

It is an arithmetic number, because the mean of its divisors is an integer number (5422047592500).

Almost surely, 2^{121100220100220} is an apocalyptic number.

121100220100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121100220100220 is an abundant number, since it is smaller than the sum of its proper divisors (139158064339780).

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

121100220100220 is a wasteful number, since it uses less digits than its factorization.

121100220100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782402438 (or 782402436 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121100220100220 its reverse (22001022001121), we get a palindrome (143101242101341).

The spelling of 121100220100220 in words is "one hundred twenty-one trillion, one hundred billion, two hundred twenty million, one hundred thousand, two hundred twenty".