1213242200 has 48 divisors (see below), whose sum is σ = 2832605160. Its totient is φ = 483264000.

The previous prime is 1213242181. The next prime is 1213242223. The reversal of 1213242200 is 22423121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35615 + ... + 60785.

Almost surely, 2^1213242200 is an apocalyptic number.

1213242200 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 1213242200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1416302580).

1213242200 is an abundant number, since it is smaller than the sum of its proper divisors (1619362960).

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

1213242200 is a wasteful number, since it uses less digits than its factorization.

1213242200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25428 (or 25419 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1213242200 is about 34831.6264334584. The cubic root of 1213242200 is about 1066.5531498121.

Adding to 1213242200 its reverse (22423121), we get a palindrome (1235665321).

The spelling of 1213242200 in words is "one billion, two hundred thirteen million, two hundred forty-two thousand, two hundred".