1004010123521 has 2 divisors, whose sum is σ = 1004010123522. Its totient is φ = 1004010123520.

The previous prime is 1004010123511. The next prime is 1004010123569. The reversal of 1004010123521 is 1253210104001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 697786232896 + 306223890625 = 835336^2 + 553375^2 .

It is an emirp because it is prime and its reverse (1253210104001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1004010123521 - 2¹⁰ = 1004010122497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1004010123493 and 1004010123502.

It is not a weakly prime, because it can be changed into another prime (1004010123511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502005061760 + 502005061761.

It is an arithmetic number, because the mean of its divisors is an integer number (502005061761).

Almost surely, 2^{1004010123521} is an apocalyptic number.

It is an amenable number.

1004010123521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004010123521 is an equidigital number, since it uses as much as digits as its factorization.

1004010123521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 1004010123521 its reverse (1253210104001), we get a palindrome (2257220227522).

The spelling of 1004010123521 in words is "one trillion, four billion, ten million, one hundred twenty-three thousand, five hundred twenty-one".