12012201252 has 72 divisors (see below), whose sum is σ = 31059413112. Its totient is φ = 3913228800.

The previous prime is 12012201233. The next prime is 12012201263. The reversal of 12012201252 is 25210221021.

It can be written as a sum of positive squares in 4 ways, for example, as 543076416 + 11469124836 = 23304^2 + 107094^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 327352 + ... + 362192.

Almost surely, 2^12012201252 is an apocalyptic number.

12012201252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12012201252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15529706556).

12012201252 is an abundant number, since it is smaller than the sum of its proper divisors (19047211860).

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

12012201252 is a wasteful number, since it uses less digits than its factorization.

12012201252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35069 (or 35064 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 12012201252 its reverse (25210221021), we get a palindrome (37222422273).

The spelling of 12012201252 in words is "twelve billion, twelve million, two hundred one thousand, two hundred fifty-two".