1221323001234 has 32 divisors (see below), whose sum is σ = 2810330985600. Its totient is φ = 346607484672.

The previous prime is 1221323001193. The next prime is 1221323001247. The reversal of 1221323001234 is 4321003231221.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97574679 + ... + 97587194.

It is an arithmetic number, because the mean of its divisors is an integer number (87822843300).

Almost surely, 2^{1221323001234} is an apocalyptic number.

1221323001234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221323001234 is an abundant number, since it is smaller than the sum of its proper divisors (1589007984366).

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

1221323001234 is a wasteful number, since it uses less digits than its factorization.

1221323001234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195162034.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1221323001234 its reverse (4321003231221), we get a palindrome (5542326232455).

The spelling of 1221323001234 in words is "one trillion, two hundred twenty-one billion, three hundred twenty-three million, one thousand, two hundred thirty-four".