1212224040 has 96 divisors (see below), whose sum is σ = 4035868200. Its totient is φ = 315371520.

The previous prime is 1212224029. The next prime is 1212224053. The reversal of 1212224040 is 404222121.

It can be written as a sum of positive squares in 4 ways, for example, as 319051044 + 893172996 = 17862^2 + 29886^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26305 + ... + 55824.

Almost surely, 2^1212224040 is an apocalyptic number.

1212224040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212224040 is an abundant number, since it is smaller than the sum of its proper divisors (2823644160).

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

1212224040 is a wasteful number, since it uses less digits than its factorization.

1212224040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82187 (or 82180 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1212224040 is about 34817.0079128003. The cubic root of 1212224040 is about 1066.2547137517.

Adding to 1212224040 its reverse (404222121), we get a palindrome (1616446161).

The spelling of 1212224040 in words is "one billion, two hundred twelve million, two hundred twenty-four thousand, forty".