121221101020210 has 8 divisors (see below), whose sum is σ = 218197981836396. Its totient is φ = 48488440408080.

The previous prime is 121221101020193. The next prime is 121221101020223. The reversal of 121221101020210 is 12020101122121.

It can be written as a sum of positive squares in 2 ways, for example, as 104677187428969 + 16543913591241 = 10231187^2 + 4067421^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6061055051001 + ... + 6061055051020.

Almost surely, 2^{121221101020210} is an apocalyptic number.

121221101020210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121221101020210 is a deficient number, since it is larger than the sum of its proper divisors (96976880816186).

121221101020210 is a wasteful number, since it uses less digits than its factorization.

121221101020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122110102028.

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

Adding to 121221101020210 its reverse (12020101122121), we get a palindrome (133241202142331).

The spelling of 121221101020210 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, one hundred one million, twenty thousand, two hundred ten".