1211210064 has 40 divisors (see below), whose sum is σ = 3476622720. Its totient is φ = 403736544.

The previous prime is 1211210057. The next prime is 1211210089. The reversal of 1211210064 is 4600121121.

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

It is a congruent number.

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, 1401432 + ... + 1402295.

It is an arithmetic number, because the mean of its divisors is an integer number (86915568).

Almost surely, 2^1211210064 is an apocalyptic number.

It is an amenable number.

1211210064 is an abundant number, since it is smaller than the sum of its proper divisors (2265412656).

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

1211210064 is a wasteful number, since it uses less digits than its factorization.

1211210064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803744 (or 2803732 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 1211210064 is about 34802.4433624997. The cubic root of 1211210064 is about 1065.9573379526.

Adding to 1211210064 its reverse (4600121121), we get a palindrome (5811331185).

The spelling of 1211210064 in words is "one billion, two hundred eleven million, two hundred ten thousand, sixty-four".