12252054721 has 9 divisors (see below), whose sum is σ = 12435025633. Its totient is φ = 12071742340.

The previous prime is 12252054709. The next prime is 12252054769. The reversal of 12252054721 is 12745025221.

It is a happy number.

The square root of 12252054721 is 110689.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 12252054721 - 2⁷ = 12252054593 is a prime.

It is a super-2 number, since 2×12252054721² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12252034721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7858140 + ... + 7859698.

Almost surely, 2^12252054721 is an apocalyptic number.

12252054721 is the 110689-th square number.

12252054721 is the 55345-th centered octagonal number.

It is an amenable number.

12252054721 is a deficient number, since it is larger than the sum of its proper divisors (182970912).

12252054721 is an frugal number, since it uses more digits than its factorization.

12252054721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

Adding to 12252054721 its reverse (12745025221), we get a palindrome (24997079942).

It can be divided in two parts, 122520 and 54721, that added together give a square (177241 = 421²).

The spelling of 12252054721 in words is "twelve billion, two hundred fifty-two million, fifty-four thousand, seven hundred twenty-one".