1213124340 has 48 divisors (see below), whose sum is σ = 3399282432. Its totient is φ = 323258496.

The previous prime is 1213124327. The next prime is 1213124347. The reversal of 1213124340 is 434213121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213124347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82422 + ... + 96018.

It is an arithmetic number, because the mean of its divisors is an integer number (70818384).

Almost surely, 2^1213124340 is an apocalyptic number.

1213124340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213124340 is an abundant number, since it is smaller than the sum of its proper divisors (2186158092).

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

1213124340 is a wasteful number, since it uses less digits than its factorization.

1213124340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15096 (or 15094 counting only the distinct ones).

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

The square root of 1213124340 is about 34829.9345391288. The cubic root of 1213124340 is about 1066.5186120463.

Adding to 1213124340 its reverse (434213121), we get a palindrome (1647337461).

The spelling of 1213124340 in words is "one billion, two hundred thirteen million, one hundred twenty-four thousand, three hundred forty".