12145020215 has 8 divisors (see below), whose sum is σ = 14702998608. Its totient is φ = 9630033280.

The previous prime is 12145020197. The next prime is 12145020227. The reversal of 12145020215 is 51202054121.

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

It is not a de Polignac number, because 12145020215 - 2¹⁰ = 12145019191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10747241 + ... + 10748370.

It is an arithmetic number, because the mean of its divisors is an integer number (1837874826).

Almost surely, 2^12145020215 is an apocalyptic number.

12145020215 is a deficient number, since it is larger than the sum of its proper divisors (2557978393).

12145020215 is a wasteful number, since it uses less digits than its factorization.

12145020215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21495729.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12145020215 its reverse (51202054121), we get a palindrome (63347074336).

The spelling of 12145020215 in words is "twelve billion, one hundred forty-five million, twenty thousand, two hundred fifteen".