12210312015 has 24 divisors (see below), whose sum is σ = 23088590928. Its totient is φ = 5920151040.

The previous prime is 12210312011. The next prime is 12210312017. The reversal of 12210312015 is 51021301221.

It is not a de Polignac number, because 12210312015 - 2² = 12210312011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210312011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12333154 + ... + 12334143.

It is an arithmetic number, because the mean of its divisors is an integer number (962024622).

Almost surely, 2^12210312015 is an apocalyptic number.

12210312015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12210312015 is a deficient number, since it is larger than the sum of its proper divisors (10878278913).

12210312015 is a wasteful number, since it uses less digits than its factorization.

12210312015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24667319 (or 24667316 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

Adding to 12210312015 its reverse (51021301221), we get a palindrome (63231613236).

The spelling of 12210312015 in words is "twelve billion, two hundred ten million, three hundred twelve thousand, fifteen".