12115021445 has 8 divisors (see below), whose sum is σ = 14550137880. Its totient is φ = 9683942400.

The previous prime is 12115021441. The next prime is 12115021447. The reversal of 12115021445 is 54412051121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1191009121 + 10924012324 = 34511^2 + 104518^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12115021445 - 2² = 12115021441 is a prime.

It is a super-2 number, since 2×12115021445² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115021441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1002740 + ... + 1014749.

It is an arithmetic number, because the mean of its divisors is an integer number (1818767235).

Almost surely, 2^12115021445 is an apocalyptic number.

It is an amenable number.

12115021445 is a deficient number, since it is larger than the sum of its proper divisors (2435116435).

12115021445 is a wasteful number, since it uses less digits than its factorization.

12115021445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018695.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 12115021445 its reverse (54412051121), we get a palindrome (66527072566).

The spelling of 12115021445 in words is "twelve billion, one hundred fifteen million, twenty-one thousand, four hundred forty-five".