121012101220221 has 32 divisors (see below), whose sum is σ = 196917734016000. Its totient is φ = 73105708739184.

The previous prime is 121012101220189. The next prime is 121012101220247. The reversal of 121012101220221 is 122022101210121.

121012101220221 is a `hidden beast` number, since 1 + 2 + 10 + 1 + 210 + 1 + 220 + 221 = 666.

It is not a de Polignac number, because 121012101220221 - 2⁵ = 121012101220189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121012101220194 and 121012101220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121012101220261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5128054191 + ... + 5128077788.

It is an arithmetic number, because the mean of its divisors is an integer number (6153679188000).

Almost surely, 2^{121012101220221} is an apocalyptic number.

It is an amenable number.

121012101220221 is a deficient number, since it is larger than the sum of its proper divisors (75905632795779).

121012101220221 is a wasteful number, since it uses less digits than its factorization.

121012101220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10256132030 (or 10256132024 counting only the distinct ones).

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

Adding to 121012101220221 its reverse (122022101210121), we get a palindrome (243034202430342).

The spelling of 121012101220221 in words is "one hundred twenty-one trillion, twelve billion, one hundred one million, two hundred twenty thousand, two hundred twenty-one".