12221542499 has 8 divisors (see below), whose sum is σ = 12754432032. Its totient is φ = 11688779520.

The previous prime is 12221542477. The next prime is 12221542507. The reversal of 12221542499 is 99424512221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221542499 is a prime.

It is a super-2 number, since 2×12221542499² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221542469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202739 + ... + 256019.

It is an arithmetic number, because the mean of its divisors is an integer number (1594304004).

Almost surely, 2^12221542499 is an apocalyptic number.

12221542499 is a deficient number, since it is larger than the sum of its proper divisors (532889533).

12221542499 is an equidigital number, since it uses as much as digits as its factorization.

12221542499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63277.

The product of its digits is 103680, while the sum is 41.

The spelling of 12221542499 in words is "twelve billion, two hundred twenty-one million, five hundred forty-two thousand, four hundred ninety-nine".