1201211664 has 40 divisors (see below), whose sum is σ = 3104697120. Its totient is φ = 400201728.

The previous prime is 1201211659. The next prime is 1201211701. The reversal of 1201211664 is 4661121021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112944 + ... + 123120.

It is an arithmetic number, because the mean of its divisors is an integer number (77617428).

Almost surely, 2^1201211664 is an apocalyptic number.

It is an amenable number.

1201211664 is an abundant number, since it is smaller than the sum of its proper divisors (1903485456).

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

1201211664 is a wasteful number, since it uses less digits than its factorization.

1201211664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12647 (or 12641 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1201211664 is about 34658.5006023053. The cubic root of 1201211664 is about 1063.0161114072.

Adding to 1201211664 its reverse (4661121021), we get a palindrome (5862332685).

The spelling of 1201211664 in words is "one billion, two hundred one million, two hundred eleven thousand, six hundred sixty-four".