121010121323221 has 8 divisors (see below), whose sum is σ = 134812336753080. Its totient is φ = 107849869401792.

The previous prime is 121010121323197. The next prime is 121010121323291. The reversal of 121010121323221 is 122323121010121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7231931100625 + 113778190222596 = 2689225^2 + 10666686^2 .

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 121010121323221 - 2¹³ = 121010121315029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121010121323192 and 121010121323201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121010121323291) 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, 160490876710 + ... + 160490877463.

It is an arithmetic number, because the mean of its divisors is an integer number (16851542094135).

Almost surely, 2^{121010121323221} is an apocalyptic number.

It is an amenable number.

121010121323221 is a deficient number, since it is larger than the sum of its proper divisors (13802215429859).

121010121323221 is a wasteful number, since it uses less digits than its factorization.

121010121323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320981754215.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 121010121323221 its reverse (122323121010121), we get a palindrome (243333242333342).

The spelling of 121010121323221 in words is "one hundred twenty-one trillion, ten billion, one hundred twenty-one million, three hundred twenty-three thousand, two hundred twenty-one".