1221450341052 has 24 divisors (see below), whose sum is σ = 2851056893776. Its totient is φ = 407006385408.

The previous prime is 1221450341051. The next prime is 1221450341057. The reversal of 1221450341052 is 2501430541221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221450341051) 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 7 ways as a sum of consecutive naturals, for example, 17930623 + ... + 17998614.

Almost surely, 2^{1221450341052} is an apocalyptic number.

1221450341052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1221450341052 is an abundant number, since it is smaller than the sum of its proper divisors (1629606552724).

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

1221450341052 is a wasteful number, since it uses less digits than its factorization.

1221450341052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35932077 (or 35932075 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1221450341052 its reverse (2501430541221), we get a palindrome (3722880882273).

The spelling of 1221450341052 in words is "one trillion, two hundred twenty-one billion, four hundred fifty million, three hundred forty-one thousand, fifty-two".