9210111012 has 72 divisors (see below), whose sum is σ = 24672375000. Its totient is φ = 2886893568.

The previous prime is 9210111011. The next prime is 9210111013. The reversal of 9210111012 is 2101110129.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9210111011) and next prime (9210111013).

It can be written as a sum of positive squares in 4 ways, for example, as 2865032676 + 6345078336 = 53526^2 + 79656^2 .

It is a super-2 number, since 2×9210111012² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (9210111011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 758364 + ... + 770412.

It is an arithmetic number, because the mean of its divisors is an integer number (342671875).

Almost surely, 2^9210111012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9210111012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12336187500).

9210111012 is an abundant number, since it is smaller than the sum of its proper divisors (15462263988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9210111012 is a wasteful number, since it uses less digits than its factorization.

9210111012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13325 (or 13320 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 9210111012 is about 95969.3232861418. The cubic root of 9210111012 is about 2096.1464486105.

The spelling of 9210111012 in words is "nine billion, two hundred ten million, one hundred eleven thousand, twelve".