1200221064 has 80 divisors (see below), whose sum is σ = 3841992000. Its totient is φ = 342919008.

The previous prime is 1200221053. The next prime is 1200221069. The reversal of 1200221064 is 4601220021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1200221069) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 127764 + ... + 136835.

It is an arithmetic number, because the mean of its divisors is an integer number (48024900).

Almost surely, 2^1200221064 is an apocalyptic number.

1200221064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1200221064 is an abundant number, since it is smaller than the sum of its proper divisors (2641770936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200221064 is a wasteful number, since it uses less digits than its factorization.

1200221064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264624 (or 264611 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1200221064 is about 34644.2067884372. The cubic root of 1200221064 is about 1062.7238194965.

Adding to 1200221064 its reverse (4601220021), we get a palindrome (5801441085).

The spelling of 1200221064 in words is "one billion, two hundred million, two hundred twenty-one thousand, sixty-four".