9122002121 has 8 divisors (see below), whose sum is σ = 9169571784. Its totient is φ = 9074540160.

The previous prime is 9122002093. The next prime is 9122002129. The reversal of 9122002121 is 1212002219.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 442471225 + 8679530896 = 21035^2 + 93164^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9122002121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9122002093 and 9122002102.

It is not an unprimeable number, because it can be changed into a prime (9122002129) 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, 145775 + ... + 198731.

It is an arithmetic number, because the mean of its divisors is an integer number (1146196473).

Almost surely, 2^9122002121 is an apocalyptic number.

It is an amenable number.

9122002121 is a deficient number, since it is larger than the sum of its proper divisors (47569663).

9122002121 is a wasteful number, since it uses less digits than its factorization.

9122002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53851.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 9122002121 is about 95509.1729678359. The cubic root of 9122002121 is about 2089.4407301441.

The spelling of 9122002121 in words is "nine billion, one hundred twenty-two million, two thousand, one hundred twenty-one".