1321223003045 has 16 divisors (see below), whose sum is σ = 1744907234112. Its totient is φ = 952386005760.

The previous prime is 1321223003003. The next prime is 1321223003047. The reversal of 1321223003045 is 5403003221231.

It is a happy number.

It is not a de Polignac number, because 1321223003045 - 2⁸ = 1321223002789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321223003047) 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, 106286867 + ... + 106299296.

It is an arithmetic number, because the mean of its divisors is an integer number (109056702132).

Almost surely, 2^{1321223003045} is an apocalyptic number.

It is an amenable number.

1321223003045 is a deficient number, since it is larger than the sum of its proper divisors (423684231067).

1321223003045 is a wasteful number, since it uses less digits than its factorization.

1321223003045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212586292.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 1321223003045 its reverse (5403003221231), we get a palindrome (6724226224276).

The spelling of 1321223003045 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-three million, three thousand, forty-five".