1211264168 has 8 divisors (see below), whose sum is σ = 2271120330. Its totient is φ = 605632080.

The previous prime is 1211264149. The next prime is 1211264177. The reversal of 1211264168 is 8614621121.

It can be written as a sum of positive squares in only one way, i.e., 1060023364 + 151240804 = 32558^2 + 12298^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75704003 + ... + 75704018.

Almost surely, 2^1211264168 is an apocalyptic number.

It is an amenable number.

1211264168 is a deficient number, since it is larger than the sum of its proper divisors (1059856162).

1211264168 is a wasteful number, since it uses less digits than its factorization.

1211264168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151408027 (or 151408023 counting only the distinct ones).

The product of its digits is 4608, while the sum is 32.

The square root of 1211264168 is about 34803.2206555658. The cubic root of 1211264168 is about 1065.9732096000.

Adding to 1211264168 its reverse (8614621121), we get a palindrome (9825885289).

The spelling of 1211264168 in words is "one billion, two hundred eleven million, two hundred sixty-four thousand, one hundred sixty-eight".