1200220136 has 16 divisors (see below), whose sum is σ = 2261839140. Its totient is φ = 597063040.

The previous prime is 1200220081. The next prime is 1200220157. The reversal of 1200220136 is 6310220021.

It can be written as a sum of positive squares in 2 ways, for example, as 792422500 + 407797636 = 28150^2 + 20194^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 379205 + ... + 382356.

Almost surely, 2^1200220136 is an apocalyptic number.

It is an amenable number.

1200220136 is a deficient number, since it is larger than the sum of its proper divisors (1061619004).

1200220136 is a wasteful number, since it uses less digits than its factorization.

1200220136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761764 (or 761760 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1200220136 is about 34644.1933951420. The cubic root of 1200220136 is about 1062.7235456003.

Adding to 1200220136 its reverse (6310220021), we get a palindrome (7510440157).

The spelling of 1200220136 in words is "one billion, two hundred million, two hundred twenty thousand, one hundred thirty-six".