121210200221121 has 24 divisors (see below), whose sum is σ = 202233061334304. Its totient is φ = 69139508146560.

The previous prime is 121210200221113. The next prime is 121210200221147. The reversal of 121210200221121 is 121122002012121.

121210200221121 is a `hidden beast` number, since 1 + 2 + 121 + 0 + 200 + 221 + 121 = 666.

It is not a de Polignac number, because 121210200221121 - 2³ = 121210200221113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121210200221094 and 121210200221103.

It is not an unprimeable number, because it can be changed into a prime (121210200221171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36010158811 + ... + 36010162176.

It is an arithmetic number, because the mean of its divisors is an integer number (8426377555596).

Almost surely, 2^{121210200221121} is an apocalyptic number.

121210200221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121210200221121 is a deficient number, since it is larger than the sum of its proper divisors (81022861113183).

121210200221121 is a wasteful number, since it uses less digits than its factorization.

121210200221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72020321021 (or 72020321018 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 121210200221121 its reverse (121122002012121), we get a palindrome (242332202233242).

The spelling of 121210200221121 in words is "one hundred twenty-one trillion, two hundred ten billion, two hundred million, two hundred twenty-one thousand, one hundred twenty-one".