121221200000210 has 8 divisors (see below), whose sum is σ = 218198160000396. Its totient is φ = 48488480000080.

The previous prime is 121221200000179. The next prime is 121221200000287. The reversal of 121221200000210 is 12000002122121.

It can be written as a sum of positive squares in 2 ways, for example, as 120443140166281 + 778059833929 = 10974659^2 + 882077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6061060000001 + ... + 6061060000020.

Almost surely, 2^{121221200000210} is an apocalyptic number.

121221200000210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221200000210 is a deficient number, since it is larger than the sum of its proper divisors (96976960000186).

121221200000210 is a wasteful number, since it uses less digits than its factorization.

121221200000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122120000028.

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

Adding to 121221200000210 its reverse (12000002122121), we get a palindrome (133221202122331).

The spelling of 121221200000210 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred million, two hundred ten", and thus it is an aban number.