1223312442000 has 160 divisors (see below), whose sum is σ = 4302501300864. Its totient is φ = 296560576000.

The previous prime is 1223312441969. The next prime is 1223312442007. The reversal of 1223312442000 is 2442133221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1223312442007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9201519 + ... + 9333518.

Almost surely, 2^{1223312442000} is an apocalyptic number.

1223312442000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223312442000 is an abundant number, since it is smaller than the sum of its proper divisors (3079188858864).

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

1223312442000 is a wasteful number, since it uses less digits than its factorization.

1223312442000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18535074 (or 18535058 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1223312442000 its reverse (2442133221), we get a palindrome (1225754575221).

The spelling of 1223312442000 in words is "one trillion, two hundred twenty-three billion, three hundred twelve million, four hundred forty-two thousand".