1213123001442 has 32 divisors (see below), whose sum is σ = 2649406342464. Its totient is φ = 367252958400.

The previous prime is 1213123001423. The next prime is 1213123001443. The reversal of 1213123001442 is 2441003213121.

It is not an unprimeable number, because it can be changed into a prime (1213123001443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8933913 + ... + 9068684.

It is an arithmetic number, because the mean of its divisors is an integer number (82793948202).

Almost surely, 2^{1213123001442} is an apocalyptic number.

1213123001442 is an abundant number, since it is smaller than the sum of its proper divisors (1436283341022).

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

1213123001442 is a wasteful number, since it uses less digits than its factorization.

1213123001442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18003634.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1213123001442 its reverse (2441003213121), we get a palindrome (3654126214563).

The spelling of 1213123001442 in words is "one trillion, two hundred thirteen billion, one hundred twenty-three million, one thousand, four hundred forty-two".