12220487515 has 16 divisors (see below), whose sum is σ = 14776632000. Its totient is φ = 9701949312.

The previous prime is 12220487471. The next prime is 12220487527. The reversal of 12220487515 is 51578402221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12220487515 - 2⁹ = 12220487003 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, 371269 + ... + 402841.

It is an arithmetic number, because the mean of its divisors is an integer number (923539500).

Almost surely, 2^12220487515 is an apocalyptic number.

12220487515 is a deficient number, since it is larger than the sum of its proper divisors (2556144485).

12220487515 is a wasteful number, since it uses less digits than its factorization.

12220487515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32166.

The product of its (nonzero) digits is 44800, while the sum is 37.

Adding to 12220487515 its reverse (51578402221), we get a palindrome (63798889736).

The spelling of 12220487515 in words is "twelve billion, two hundred twenty million, four hundred eighty-seven thousand, five hundred fifteen".