1224021210345 has 12 divisors (see below), whose sum is σ = 2121636764676. Its totient is φ = 652811312160.

The previous prime is 1224021210337. The next prime is 1224021210353. The reversal of 1224021210345 is 5430121204221.

1224021210345 is a `hidden beast` number, since 1 + 2 + 2 + 402 + 1 + 210 + 3 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (1224021210337) and next prime (1224021210353).

It can be written as a sum of positive squares in 2 ways, for example, as 857555637849 + 366465572496 = 926043^2 + 605364^2 .

It is not a de Polignac number, because 1224021210345 - 2³ = 1224021210337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13600235626 + ... + 13600235715.

It is an arithmetic number, because the mean of its divisors is an integer number (176803063723).

Almost surely, 2^{1224021210345} is an apocalyptic number.

1224021210345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224021210345 is a deficient number, since it is larger than the sum of its proper divisors (897615554331).

1224021210345 is a wasteful number, since it uses less digits than its factorization.

1224021210345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27200471352 (or 27200471349 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 1224021210345 its reverse (5430121204221), we get a palindrome (6654142414566).

The spelling of 1224021210345 in words is "one trillion, two hundred twenty-four billion, twenty-one million, two hundred ten thousand, three hundred forty-five".