1020421344004 has 12 divisors (see below), whose sum is σ = 1797722167500. Its totient is φ = 506786439008.

The previous prime is 1020421344001. The next prime is 1020421344017. The reversal of 1020421344004 is 4004431240201.

It can be written as a sum of positive squares in 2 ways, for example, as 621098457604 + 399322886400 = 788098^2 + 631920^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1020421344004.

It is not an unprimeable number, because it can be changed into a prime (1020421344001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 856057579 + ... + 856058770.

It is an arithmetic number, because the mean of its divisors is an integer number (149810180625).

Almost surely, 2^{1020421344004} is an apocalyptic number.

It is an amenable number.

1020421344004 is a deficient number, since it is larger than the sum of its proper divisors (777300823496).

1020421344004 is a wasteful number, since it uses less digits than its factorization.

1020421344004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712116502 (or 1712116500 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1020421344004 its reverse (4004431240201), we get a palindrome (5024852584205).

The spelling of 1020421344004 in words is "one trillion, twenty billion, four hundred twenty-one million, three hundred forty-four thousand, four".