1021320503004 has 24 divisors (see below), whose sum is σ = 2383115033488. Its totient is φ = 340435330560.

The previous prime is 1021320502967. The next prime is 1021320503009. The reversal of 1021320503004 is 4003050231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021320503009) 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, 333324 + ... + 1467564.

Almost surely, 2^{1021320503004} is an apocalyptic number.

It is an amenable number.

1021320503004 is an abundant number, since it is smaller than the sum of its proper divisors (1361794530484).

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

1021320503004 is a wasteful number, since it uses less digits than its factorization.

1021320503004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209285 (or 1209283 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 1021320503004 its reverse (4003050231201), we get a palindrome (5024370734205).

The spelling of 1021320503004 in words is "one trillion, twenty-one billion, three hundred twenty million, five hundred three thousand, four".