12021360605 has 8 divisors (see below), whose sum is σ = 14444693592. Its totient is φ = 9604381248.

The previous prime is 12021360599. The next prime is 12021360607. The reversal of 12021360605 is 50606312021.

It can be written as a sum of positive squares in 4 ways, for example, as 5717476996 + 6303883609 = 75614^2 + 79397^2 .

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-12021360605 is a prime.

It is a super-2 number, since 2×12021360605² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021360607) 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, 1584242 + ... + 1591811.

It is an arithmetic number, because the mean of its divisors is an integer number (1805586699).

Almost surely, 2^12021360605 is an apocalyptic number.

It is an amenable number.

12021360605 is a deficient number, since it is larger than the sum of its proper divisors (2423332987).

12021360605 is an equidigital number, since it uses as much as digits as its factorization.

12021360605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3176815.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 12021360605 its reverse (50606312021), we get a palindrome (62627672626).

The spelling of 12021360605 in words is "twelve billion, twenty-one million, three hundred sixty thousand, six hundred five".