1213453221403 has 8 divisors (see below), whose sum is σ = 1286010507600. Its totient is φ = 1141026789120.

The previous prime is 1213453221401. The next prime is 1213453221443. The reversal of 1213453221403 is 3041223543121.

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

It is a cyclic number.

It is not a de Polignac number, because 1213453221403 - 2¹ = 1213453221401 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 32694378 + ... + 32731471.

It is an arithmetic number, because the mean of its divisors is an integer number (160751313450).

Almost surely, 2^{1213453221403} is an apocalyptic number.

1213453221403 is a deficient number, since it is larger than the sum of its proper divisors (72557286197).

1213453221403 is a wasteful number, since it uses less digits than its factorization.

1213453221403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65426957.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 1213453221403 its reverse (3041223543121), we get a palindrome (4254676764524).

The spelling of 1213453221403 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty-one thousand, four hundred three".