10140406665021 has 20 divisors (see below), whose sum is σ = 15182998815292. Its totient is φ = 6744658451328.

The previous prime is 10140406665007. The next prime is 10140406665023. The reversal of 10140406665021 is 12056660404101.

It can be written as a sum of positive squares in 2 ways, for example, as 3777526539396 + 6362880125625 = 1943586^2 + 2522475^2 .

It is not a de Polignac number, because 10140406665021 - 2⁶ = 10140406664957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10140406665023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 144526366 + ... + 144596511.

Almost surely, 2^{10140406665021} is an apocalyptic number.

It is an amenable number.

10140406665021 is a deficient number, since it is larger than the sum of its proper divisors (5042592150271).

10140406665021 is an equidigital number, since it uses as much as digits as its factorization.

10140406665021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289123322 (or 289123313 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 10140406665021 in words is "ten trillion, one hundred forty billion, four hundred six million, six hundred sixty-five thousand, twenty-one".