5021511802129 has 9 divisors (see below), whose sum is σ = 5038115209617. Its totient is φ = 5004962955024.

The previous prime is 5021511802123. The next prime is 5021511802171. The reversal of 5021511802129 is 9212081151205.

The square root of 5021511802129 is 2240873.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2079436100625 + 2942075701504 = 1442025^2 + 1715248^2 .

It is not a de Polignac number, because 5021511802129 - 2⁹ = 5021511801617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5021511802123) 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 8 ways as a sum of consecutive naturals, for example, 710353207 + ... + 710360275.

Almost surely, 2^{5021511802129} is an apocalyptic number.

5021511802129 is the 2240873-rd square number.

5021511802129 is the 1120437-th centered octagonal number.

It is an amenable number.

5021511802129 is a deficient number, since it is larger than the sum of its proper divisors (16603407488).

5021511802129 is an frugal number, since it uses more digits than its factorization.

5021511802129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14772 (or 7386 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 37.

The spelling of 5021511802129 in words is "five trillion, twenty-one billion, five hundred eleven million, eight hundred two thousand, one hundred twenty-nine".