1321421542004 has 24 divisors (see below), whose sum is σ = 2337179614056. Its totient is φ = 653666000000.

The previous prime is 1321421542003. The next prime is 1321421542027. The reversal of 1321421542004 is 4002451241231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31261776100 + 1290159765904 = 176810^2 + 1135852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321421542003) 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, 731447 + ... + 1782654.

It is an arithmetic number, because the mean of its divisors is an integer number (97382483919).

Almost surely, 2^{1321421542004} is an apocalyptic number.

It is an amenable number.

1321421542004 is a deficient number, since it is larger than the sum of its proper divisors (1015758072052).

1321421542004 is a wasteful number, since it uses less digits than its factorization.

1321421542004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515507 (or 2515505 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 1321421542004 its reverse (4002451241231), we get a palindrome (5323872783235).

The spelling of 1321421542004 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-one million, five hundred forty-two thousand, four".