1213434120 has 128 divisors (see below), whose sum is σ = 3720038400. Its totient is φ = 316551936.

The previous prime is 1213434083. The next prime is 1213434133. The reversal of 1213434120 is 214343121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2598127 + ... + 2598593.

It is an arithmetic number, because the mean of its divisors is an integer number (29062800).

Almost surely, 2^1213434120 is an apocalyptic number.

1213434120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213434120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1860019200).

1213434120 is an abundant number, since it is smaller than the sum of its proper divisors (2506604280).

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

1213434120 is a wasteful number, since it uses less digits than its factorization.

1213434120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907 (or 903 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1213434120 is about 34834.3812920511. The cubic root of 1213434120 is about 1066.6093853788.

Adding to 1213434120 its reverse (214343121), we get a palindrome (1427777241).

Subtracting from 1213434120 its reverse (214343121), we obtain a palindrome (999090999).

The spelling of 1213434120 in words is "one billion, two hundred thirteen million, four hundred thirty-four thousand, one hundred twenty".