9012121121 has 8 divisors (see below), whose sum is σ = 9049320000. Its totient is φ = 8974950160.

The previous prime is 9012121103. The next prime is 9012121127. The reversal of 9012121121 is 1211212109.

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-9012121121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9012121093 and 9012121102.

It is not an unprimeable number, because it can be changed into a prime (9012121127) 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, 853130 + ... + 863628.

It is an arithmetic number, because the mean of its divisors is an integer number (1131165000).

Almost surely, 2^9012121121 is an apocalyptic number.

It is an amenable number.

9012121121 is a deficient number, since it is larger than the sum of its proper divisors (37198879).

9012121121 is a wasteful number, since it uses less digits than its factorization.

9012121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13959.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 9012121121 is about 94932.1922268732. The cubic root of 9012121121 is about 2081.0172170264.

The spelling of 9012121121 in words is "nine billion, twelve million, one hundred twenty-one thousand, one hundred twenty-one".