1223121442342 has 24 divisors (see below), whose sum is σ = 1845439893360. Its totient is φ = 607995363360.

The previous prime is 1223121442327. The next prime is 1223121442379. The reversal of 1223121442342 is 2432441213221.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 117275584 + ... + 117286012.

It is an arithmetic number, because the mean of its divisors is an integer number (76893328890).

Almost surely, 2^{1223121442342} is an apocalyptic number.

1223121442342 is a deficient number, since it is larger than the sum of its proper divisors (622318451018).

1223121442342 is a wasteful number, since it uses less digits than its factorization.

1223121442342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12336 (or 12139 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

Adding to 1223121442342 its reverse (2432441213221), we get a palindrome (3655562655563).

The spelling of 1223121442342 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-one million, four hundred forty-two thousand, three hundred forty-two".