1200221345 has 16 divisors (see below), whose sum is σ = 1464661440. Its totient is φ = 944049600.

The previous prime is 1200221339. The next prime is 1200221353. The reversal of 1200221345 is 5431220021.

It is not a de Polignac number, because 1200221345 - 2⁴ = 1200221329 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, 62990 + ... + 79800.

It is an arithmetic number, because the mean of its divisors is an integer number (91541340).

Almost surely, 2^1200221345 is an apocalyptic number.

It is an amenable number.

1200221345 is a deficient number, since it is larger than the sum of its proper divisors (264440095).

1200221345 is a wasteful number, since it uses less digits than its factorization.

1200221345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17056.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1200221345 is about 34644.2108439491. The cubic root of 1200221345 is about 1062.7239024327.

Adding to 1200221345 its reverse (5431220021), we get a palindrome (6631441366).

The spelling of 1200221345 in words is "one billion, two hundred million, two hundred twenty-one thousand, three hundred forty-five".