1221033342 has 32 divisors (see below), whose sum is σ = 2529377280. Its totient is φ = 392493920.

The previous prime is 1221033293. The next prime is 1221033349. The reversal of 1221033342 is 2433301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221033349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154663 + ... + 162365.

It is an arithmetic number, because the mean of its divisors is an integer number (79043040).

Almost surely, 2^1221033342 is an apocalyptic number.

1221033342 is an abundant number, since it is smaller than the sum of its proper divisors (1308343938).

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

1221033342 is a wasteful number, since it uses less digits than its factorization.

1221033342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1221033342 is about 34943.2875099067. The cubic root of 1221033342 is about 1068.8313271582.

Adding to 1221033342 its reverse (2433301221), we get a palindrome (3654334563).

The spelling of 1221033342 in words is "one billion, two hundred twenty-one million, thirty-three thousand, three hundred forty-two".