121210112100220 has 48 divisors (see below), whose sum is σ = 299041451398368. Its totient is φ = 40685911752960.

The previous prime is 121210112100191. The next prime is 121210112100239. The reversal of 121210112100220 is 22001211012121.

It is a junction number, because it is equal to n+sod(n) for n = 121210112100194 and 121210112100203.

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, 21190576179 + ... + 21190581898.

It is an arithmetic number, because the mean of its divisors is an integer number (6230030237466).

Almost surely, 2^{121210112100220} is an apocalyptic number.

121210112100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210112100220 is an abundant number, since it is smaller than the sum of its proper divisors (177831339298148).

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

121210112100220 is a wasteful number, since it uses less digits than its factorization.

121210112100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42381158110 (or 42381158108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121210112100220 its reverse (22001211012121), we get a palindrome (143211323112341).

The spelling of 121210112100220 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twelve million, one hundred thousand, two hundred twenty".