9000021121 has 16 divisors (see below), whose sum is σ = 11079540864. Its totient is φ = 7119229824.

The previous prime is 9000021101. The next prime is 9000021157. The reversal of 9000021121 is 1211200009.

It is not a de Polignac number, because 9000021121 - 2¹¹ = 9000019073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9000021095 and 9000021104.

It is not an unprimeable number, because it can be changed into a prime (9000021101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506046 + ... + 523528.

It is an arithmetic number, because the mean of its divisors is an integer number (692471304).

Almost surely, 2^9000021121 is an apocalyptic number.

9000021121 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9000021121 is a deficient number, since it is larger than the sum of its proper divisors (2079519743).

9000021121 is a wasteful number, since it uses less digits than its factorization.

9000021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23160.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 9000021121 is about 94868.4411224302. The cubic root of 9000021121 is about 2080.0854502155.

The spelling of 9000021121 in words is "nine billion, twenty-one thousand, one hundred twenty-one".