1213211208 has 64 divisors (see below), whose sum is σ = 3312691200. Its totient is φ = 367202880.

The previous prime is 1213211191. The next prime is 1213211213. The reversal of 1213211208 is 8021123121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272085 + ... + 276507.

It is an arithmetic number, because the mean of its divisors is an integer number (51760800).

Almost surely, 2^1213211208 is an apocalyptic number.

It is an amenable number.

1213211208 is an abundant number, since it is smaller than the sum of its proper divisors (2099479992).

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

1213211208 is a wasteful number, since it uses less digits than its factorization.

1213211208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5482 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 1213211208 is about 34831.1815475731. The cubic root of 1213211208 is about 1066.5440681144.

Adding to 1213211208 its reverse (8021123121), we get a palindrome (9234334329).

The spelling of 1213211208 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, two hundred eight".