12120431215 has 4 divisors (see below), whose sum is σ = 14544517464. Its totient is φ = 9696344968.

The previous prime is 12120431209. The next prime is 12120431249. The reversal of 12120431215 is 51213402121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12120431215 - 2³ = 12120431207 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 3 ways as a sum of consecutive naturals, for example, 1212043117 + ... + 1212043126.

It is an arithmetic number, because the mean of its divisors is an integer number (3636129366).

Almost surely, 2^12120431215 is an apocalyptic number.

12120431215 is a deficient number, since it is larger than the sum of its proper divisors (2424086249).

12120431215 is an equidigital number, since it uses as much as digits as its factorization.

12120431215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424086248.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 12120431215 its reverse (51213402121), we get a palindrome (63333833336).

The spelling of 12120431215 in words is "twelve billion, one hundred twenty million, four hundred thirty-one thousand, two hundred fifteen".