121210122100220 has 24 divisors (see below), whose sum is σ = 254545979133264. Its totient is φ = 48483149273856.

The previous prime is 121210122100159. The next prime is 121210122100259. The reversal of 121210122100220 is 22001221012121.

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 7 ways as a sum of consecutive naturals, for example, 55117469 + ... + 57274388.

It is an arithmetic number, because the mean of its divisors is an integer number (10606082463886).

Almost surely, 2^{121210122100220} is an apocalyptic number.

121210122100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121210122100220 is an abundant number, since it is smaller than the sum of its proper divisors (133335857033044).

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

121210122100220 is a wasteful number, since it uses less digits than its factorization.

121210122100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112445789 (or 112445787 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121210122100220 its reverse (22001221012121), we get a palindrome (143211343112341).

The spelling of 121210122100220 in words is "one hundred twenty-one trillion, two hundred ten billion, one hundred twenty-two million, one hundred thousand, two hundred twenty".