1213453221442 has 64 divisors (see below), whose sum is σ = 2316229344000. Its totient is φ = 472651146240.

The previous prime is 1213453221401. The next prime is 1213453221443. The reversal of 1213453221442 is 2441223543121.

It is a junction number, because it is equal to n+sod(n) for n = 1213453221398 and 1213453221407.

It is not an unprimeable number, because it can be changed into a prime (1213453221443) 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, 32346048 + ... + 32383540.

It is an arithmetic number, because the mean of its divisors is an integer number (36191083500).

Almost surely, 2^{1213453221442} is an apocalyptic number.

1213453221442 is a deficient number, since it is larger than the sum of its proper divisors (1102776122558).

1213453221442 is a wasteful number, since it uses less digits than its factorization.

1213453221442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41816 (or 41802 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

Adding to 1213453221442 its reverse (2441223543121), we get a palindrome (3654676764563).

The spelling of 1213453221442 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty-one thousand, four hundred forty-two".