1221030040 has 32 divisors (see below), whose sum is σ = 2768301360. Its totient is φ = 484681600.

The previous prime is 1221030037. The next prime is 1221030067. The reversal of 1221030040 is 400301221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221030040.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 111271 + ... + 121750.

Almost surely, 2^1221030040 is an apocalyptic number.

1221030040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1221030040 is an abundant number, since it is smaller than the sum of its proper divisors (1547271320).

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

1221030040 is a wasteful number, since it uses less digits than its factorization.

1221030040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233163 (or 233159 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1221030040 is about 34943.2402618876. The cubic root of 1221030040 is about 1068.8303636890.

Adding to 1221030040 its reverse (400301221), we get a palindrome (1621331261).

The spelling of 1221030040 in words is "one billion, two hundred twenty-one million, thirty thousand, forty".