7212181161352 has 16 divisors (see below), whose sum is σ = 13535930534940. Its totient is φ = 3602599685376.

The previous prime is 7212181161319. The next prime is 7212181161377. The reversal of 7212181161352 is 2531611812127.

It can be written as a sum of positive squares in 2 ways, for example, as 7099208540356 + 112972620996 = 2664434^2 + 336114^2 .

It is a super-3 number, since 3×7212181161352³ (a number of 40 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436353133 + ... + 436369660.

Almost surely, 2^{7212181161352} is an apocalyptic number.

It is an amenable number.

7212181161352 is a deficient number, since it is larger than the sum of its proper divisors (6323749373588).

7212181161352 is a wasteful number, since it uses less digits than its factorization.

7212181161352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872723832 (or 872723828 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

Adding to 7212181161352 its reverse (2531611812127), we get a palindrome (9743792973479).

The spelling of 7212181161352 in words is "seven trillion, two hundred twelve billion, one hundred eighty-one million, one hundred sixty-one thousand, three hundred fifty-two".