10240023135421 has 4 divisors (see below), whose sum is σ = 10593127381500. Its totient is φ = 9886918889344.

The previous prime is 10240023135409. The next prime is 10240023135457. The reversal of 10240023135421 is 12453132004201.

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 7198971948100 + 3041051187321 = 2683090^2 + 1743861^2 .

It is a cyclic number.

It is not a de Polignac number, because 10240023135421 - 2⁵ = 10240023135389 is a prime.

It is a super-3 number, since 3×10240023135421³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10240023135421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10240023135491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176552122996 + ... + 176552123053.

It is an arithmetic number, because the mean of its divisors is an integer number (2648281845375).

Almost surely, 2^{10240023135421} is an apocalyptic number.

It is an amenable number.

10240023135421 is a deficient number, since it is larger than the sum of its proper divisors (353104246079).

10240023135421 is an equidigital number, since it uses as much as digits as its factorization.

10240023135421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353104246078.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 10240023135421 its reverse (12453132004201), we get a palindrome (22693155139622).

The spelling of 10240023135421 in words is "ten trillion, two hundred forty billion, twenty-three million, one hundred thirty-five thousand, four hundred twenty-one".