121221202110211 has 8 divisors (see below), whose sum is σ = 138558458960640. Its totient is φ = 103888930825608.

The previous prime is 121221202110179. The next prime is 121221202110223. The reversal of 121221202110211 is 112011202122121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121221202110211 - 2⁵ = 121221202110179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221202110251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1246339351 + ... + 1246436608.

It is an arithmetic number, because the mean of its divisors is an integer number (17319807370080).

Almost surely, 2^{121221202110211} is an apocalyptic number.

121221202110211 is a deficient number, since it is larger than the sum of its proper divisors (17337256850429).

121221202110211 is an equidigital number, since it uses as much as digits as its factorization.

121221202110211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492782913.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121221202110211 its reverse (112011202122121), we get a palindrome (233232404232332).

The spelling of 121221202110211 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two hundred two million, one hundred ten thousand, two hundred eleven".