10015421125 has 8 divisors (see below), whose sum is σ = 12499245720. Its totient is φ = 8012336800.

The previous prime is 10015421111. The next prime is 10015421167. The reversal of 10015421125 is 52112451001.

It can be written as a sum of positive squares in 4 ways, for example, as 3085358116 + 6930063009 = 55546^2 + 83247^2 .

It is not a de Polignac number, because 10015421125 - 2¹¹ = 10015419077 is a prime.

It is a super-2 number, since 2×10015421125² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10015421096 and 10015421105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40061560 + ... + 40061809.

It is an arithmetic number, because the mean of its divisors is an integer number (1562405715).

Almost surely, 2^10015421125 is an apocalyptic number.

It is an amenable number.

10015421125 is a deficient number, since it is larger than the sum of its proper divisors (2483824595).

10015421125 is an frugal number, since it uses more digits than its factorization.

10015421125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80123384 (or 80123374 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 10015421125 its reverse (52112451001), we get a palindrome (62127872126).

The spelling of 10015421125 in words is "ten billion, fifteen million, four hundred twenty-one thousand, one hundred twenty-five".