1213453221402 has 8 divisors (see below), whose sum is σ = 2426906442816. Its totient is φ = 404484407132.

The previous prime is 1213453221401. The next prime is 1213453221443. The reversal of 1213453221402 is 2041223543121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1213453221402 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213453221402.

It is not an unprimeable number, because it can be changed into a prime (1213453221401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101121101778 + ... + 101121101789.

It is an arithmetic number, because the mean of its divisors is an integer number (303363305352).

Almost surely, 2^{1213453221402} is an apocalyptic number.

1213453221402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1213453221402 is a wasteful number, since it uses less digits than its factorization.

1213453221402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202242203572.

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1213453221402 its reverse (2041223543121), we get a palindrome (3254676764523).

The spelling of 1213453221402 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty-one thousand, four hundred two".