121220100221210 has 8 divisors (see below), whose sum is σ = 218196180398196. Its totient is φ = 48488040088480.

The previous prime is 121220100221201. The next prime is 121220100221291. The reversal of 121220100221210 is 12122001022121.

It can be written as a sum of positive squares in 2 ways, for example, as 116493576381961 + 4726523839249 = 10793219^2 + 2174057^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6061005011051 + ... + 6061005011070.

Almost surely, 2^{121220100221210} is an apocalyptic number.

121220100221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220100221210 is a deficient number, since it is larger than the sum of its proper divisors (96976080176986).

121220100221210 is a wasteful number, since it uses less digits than its factorization.

121220100221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122010022128.

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

Adding to 121220100221210 its reverse (12122001022121), we get a palindrome (133342101243331).

The spelling of 121220100221210 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred million, two hundred twenty-one thousand, two hundred ten".