1321444023004 has 24 divisors (see below), whose sum is σ = 2734022118240. Its totient is φ = 546804422976.

The previous prime is 1321444022971. The next prime is 1321444023017. The reversal of 1321444023004 is 4003204441231.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 813696247 + ... + 813697870.

It is an arithmetic number, because the mean of its divisors is an integer number (113917588260).

Almost surely, 2^{1321444023004} is an apocalyptic number.

1321444023004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1321444023004 is an abundant number, since it is smaller than the sum of its proper divisors (1412578095236).

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

1321444023004 is a wasteful number, since it uses less digits than its factorization.

1321444023004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627394157 (or 1627394155 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1321444023004 its reverse (4003204441231), we get a palindrome (5324648464235).

The spelling of 1321444023004 in words is "one trillion, three hundred twenty-one billion, four hundred forty-four million, twenty-three thousand, four".