12023421515 has 16 divisors (see below), whose sum is σ = 16721510400. Its totient is φ = 8128508640.

The previous prime is 12023421481. The next prime is 12023421523. The reversal of 12023421515 is 51512432021.

It is not a de Polignac number, because 12023421515 - 2¹⁰ = 12023420491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2416715 + ... + 2421684.

It is an arithmetic number, because the mean of its divisors is an integer number (1045094400).

Almost surely, 2^12023421515 is an apocalyptic number.

12023421515 is a deficient number, since it is larger than the sum of its proper divisors (4698088885).

12023421515 is an equidigital number, since it uses as much as digits as its factorization.

12023421515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838482.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12023421515 its reverse (51512432021), we get a palindrome (63535853536).

The spelling of 12023421515 in words is "twelve billion, twenty-three million, four hundred twenty-one thousand, five hundred fifteen".