9113512021 has 8 divisors (see below), whose sum is σ = 9511942104. Its totient is φ = 8723470080.

The previous prime is 9113512007. The next prime is 9113512027. The reversal of 9113512021 is 1202153119.

It can be written as a sum of positive squares in 4 ways, for example, as 1029703921 + 8083808100 = 32089^2 + 89910^2 .

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 9113512021 - 2¹¹ = 9113509973 is a prime.

It is a super-2 number, since 2×9113512021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9113512027) 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, 2094816 + ... + 2099161.

It is an arithmetic number, because the mean of its divisors is an integer number (1188992763).

Almost surely, 2^9113512021 is an apocalyptic number.

It is an amenable number.

9113512021 is a deficient number, since it is larger than the sum of its proper divisors (398430083).

9113512021 is a wasteful number, since it uses less digits than its factorization.

9113512021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194071.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 9113512021 is about 95464.7161049568. The cubic root of 9113512021 is about 2088.7922954795.

The spelling of 9113512021 in words is "nine billion, one hundred thirteen million, five hundred twelve thousand, twenty-one".