12170061156 has 96 divisors (see below), whose sum is σ = 31363920000. Its totient is φ = 3642163200.

The previous prime is 12170061121. The next prime is 12170061173. The reversal of 12170061156 is 65116007121.

It is a super-2 number, since 2×12170061156² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9743220 + ... + 9744468.

It is an arithmetic number, because the mean of its divisors is an integer number (326707500).

Almost surely, 2^12170061156 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 12170061156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15681960000).

12170061156 is an abundant number, since it is smaller than the sum of its proper divisors (19193858844).

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

12170061156 is a wasteful number, since it uses less digits than its factorization.

12170061156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

Adding to 12170061156 its reverse (65116007121), we get a palindrome (77286068277).

The spelling of 12170061156 in words is "twelve billion, one hundred seventy million, sixty-one thousand, one hundred fifty-six".