12215521355 has 8 divisors (see below), whose sum is σ = 14935203792. Its totient is φ = 9588031648.

The previous prime is 12215521349. The next prime is 12215521369. The reversal of 12215521355 is 55312551221.

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

It is a cyclic number.

It is not a de Polignac number, because 12215521355 - 2⁶ = 12215521291 is a prime.

It is a super-2 number, since 2×12215521355² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23047889 + ... + 23048418.

It is an arithmetic number, because the mean of its divisors is an integer number (1866900474).

Almost surely, 2^12215521355 is an apocalyptic number.

12215521355 is a deficient number, since it is larger than the sum of its proper divisors (2719682437).

12215521355 is an equidigital number, since it uses as much as digits as its factorization.

12215521355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46096365.

The product of its digits is 15000, while the sum is 32.

The spelling of 12215521355 in words is "twelve billion, two hundred fifteen million, five hundred twenty-one thousand, three hundred fifty-five".