1242212200 has 24 divisors (see below), whose sum is σ = 2888143830. Its totient is φ = 496884800.

The previous prime is 1242212197. The next prime is 1242212201. The reversal of 1242212200 is 22122421.

It can be written as a sum of positive squares in 3 ways, for example, as 621305476 + 620906724 = 24926^2 + 24918^2 .

It is a super-2 number, since 2×1242212200² = 3086182299657680000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1242212201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3105331 + ... + 3105730.

Almost surely, 2^1242212200 is an apocalyptic number.

1242212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242212200 is an abundant number, since it is smaller than the sum of its proper divisors (1645931630).

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

1242212200 is a wasteful number, since it uses less digits than its factorization.

1242212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211077 (or 6211068 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1242212200 is about 35245.0308554270. The cubic root of 1242212200 is about 1074.9755754321.

Adding to 1242212200 its reverse (22122421), we get a palindrome (1264334621).

The spelling of 1242212200 in words is "one billion, two hundred forty-two million, two hundred twelve thousand, two hundred".