1213212408 has 32 divisors (see below), whose sum is σ = 3082756560. Its totient is φ = 397774080.

The previous prime is 1213212397. The next prime is 1213212421. The reversal of 1213212408 is 8042123121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412885 + ... + 415812.

Almost surely, 2^1213212408 is an apocalyptic number.

It is an amenable number.

1213212408 is an abundant number, since it is smaller than the sum of its proper divisors (1869544152).

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

1213212408 is a wasteful number, since it uses less digits than its factorization.

1213212408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828767 (or 828763 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1213212408 is about 34831.1987735134. The cubic root of 1213212408 is about 1066.5444197576.

Adding to 1213212408 its reverse (8042123121), we get a palindrome (9255335529).

The spelling of 1213212408 in words is "one billion, two hundred thirteen million, two hundred twelve thousand, four hundred eight".