121010211221121 has 24 divisors (see below), whose sum is σ = 175074806186280. Its totient is φ = 80543289171456.

The previous prime is 121010211221093. The next prime is 121010211221161. The reversal of 121010211221121 is 121122112010121.

It is a happy number.

121010211221121 is a `hidden beast` number, since 1 + 210 + 1 + 0 + 211 + 221 + 1 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 69445805562225 + 51564405658896 = 8333415^2 + 7180836^2 .

It is not a de Polignac number, because 121010211221121 - 2¹⁰ = 121010211220097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121010211221094 and 121010211221103.

It is not an unprimeable number, because it can be changed into a prime (121010211221161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10822135 + ... + 18950963.

It is an arithmetic number, because the mean of its divisors is an integer number (7294783591095).

Almost surely, 2^{121010211221121} is an apocalyptic number.

It is an amenable number.

121010211221121 is a deficient number, since it is larger than the sum of its proper divisors (54064594965159).

121010211221121 is a wasteful number, since it uses less digits than its factorization.

121010211221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8131505 (or 8131502 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 121010211221121 its reverse (121122112010121), we get a palindrome (242132323231242).

The spelling of 121010211221121 in words is "one hundred twenty-one trillion, ten billion, two hundred eleven million, two hundred twenty-one thousand, one hundred twenty-one".