10125000055021 has 4 divisors (see below), whose sum is σ = 10162639460700. Its totient is φ = 10087360649344.

The previous prime is 10125000055019. The next prime is 10125000055039. The reversal of 10125000055021 is 12055000052101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5267075490121 + 4857924564900 = 2295011^2 + 2204070^2 .

It is a cyclic number.

It is not a de Polignac number, because 10125000055021 - 2¹ = 10125000055019 is a prime.

It is a super-2 number, since 2×10125000055021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10125000054983 and 10125000055001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10125000055081) 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, 18819702436 + ... + 18819702973.

It is an arithmetic number, because the mean of its divisors is an integer number (2540659865175).

Almost surely, 2^{10125000055021} is an apocalyptic number.

It is an amenable number.

10125000055021 is a deficient number, since it is larger than the sum of its proper divisors (37639405679).

10125000055021 is an equidigital number, since it uses as much as digits as its factorization.

10125000055021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37639405678.

The product of its (nonzero) digits is 500, while the sum is 22.

The spelling of 10125000055021 in words is "ten trillion, one hundred twenty-five billion, fifty-five thousand, twenty-one".