1121010212221 has 8 divisors (see below), whose sum is σ = 1140590947320. Its totient is φ = 1101543651072.

The previous prime is 1121010212197. The next prime is 1121010212237. The reversal of 1121010212221 is 1222120101211.

It can be written as a sum of positive squares in 4 ways, for example, as 173171667321 + 947838544900 = 416139^2 + 973570^2 .

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 1121010212221 - 2⁷ = 1121010212093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121010212195 and 1121010212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121010212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28523680 + ... + 28562953.

It is an arithmetic number, because the mean of its divisors is an integer number (142573868415).

Almost surely, 2^{1121010212221} is an apocalyptic number.

It is an amenable number.

1121010212221 is a deficient number, since it is larger than the sum of its proper divisors (19580735099).

1121010212221 is an equidigital number, since it uses as much as digits as its factorization.

1121010212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57086975.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121010212221 its reverse (1222120101211), we get a palindrome (2343130313432).

The spelling of 1121010212221 in words is "one trillion, one hundred twenty-one billion, ten million, two hundred twelve thousand, two hundred twenty-one".