12102321152 has 44 divisors (see below), whose sum is σ = 24253977756. Its totient is φ = 6035865600.

The previous prime is 12102321137. The next prime is 12102321173. The reversal of 12102321152 is 25112320121.

It can be written as a sum of positive squares in 2 ways, for example, as 8452228096 + 3650093056 = 91936^2 + 60416^2 .

It is a super-2 number, since 2×12102321152² (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 3 ways as a sum of consecutive naturals, for example, 395888 + ... + 425360.

Almost surely, 2^12102321152 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 12102321152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12126988878).

12102321152 is an abundant number, since it is smaller than the sum of its proper divisors (12151656604).

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

12102321152 is an equidigital number, since it uses as much as digits as its factorization.

12102321152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29894 (or 29876 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 12102321152 its reverse (25112320121), we get a palindrome (37214641273).

The spelling of 12102321152 in words is "twelve billion, one hundred two million, three hundred twenty-one thousand, one hundred fifty-two".