121122110210221 has 12 divisors (see below), whose sum is σ = 125171306523900. Its totient is φ = 117199966192320.

The previous prime is 121122110210201. The next prime is 121122110210281. The reversal of 121122110210221 is 122012011221121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38582359560900 + 82539750649321 = 6211470^2 + 9085139^2 .

It is not a de Polignac number, because 121122110210221 - 2⁴³ = 112326017188013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122110210201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525736 + ... + 15573073.

It is an arithmetic number, because the mean of its divisors is an integer number (10430942210325).

Almost surely, 2^{121122110210221} is an apocalyptic number.

It is an amenable number.

121122110210221 is a deficient number, since it is larger than the sum of its proper divisors (4049196313679).

121122110210221 is an equidigital number, since it uses as much as digits as its factorization.

121122110210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16106700 (or 16106669 counting only the distinct ones).

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

Adding to 121122110210221 its reverse (122012011221121), we get a palindrome (243134121431342).

The spelling of 121122110210221 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one hundred ten million, two hundred ten thousand, two hundred twenty-one".