10501240021 has 4 divisors (see below), whose sum is σ = 10679227200. Its totient is φ = 10323252844.

The previous prime is 10501239997. The next prime is 10501240067. The reversal of 10501240021 is 12004210501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12004210501 = 32429 ⋅370169.

It is a cyclic number.

It is not a de Polignac number, because 10501240021 - 2⁷ = 10501239893 is a prime.

It is a super-2 number, since 2×10501240021² (a number of 21 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 = 10501239977 and 10501240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10501241021) 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, 88993501 + ... + 88993618.

It is an arithmetic number, because the mean of its divisors is an integer number (2669806800).

Almost surely, 2^10501240021 is an apocalyptic number.

It is an amenable number.

10501240021 is a deficient number, since it is larger than the sum of its proper divisors (177987179).

10501240021 is an equidigital number, since it uses as much as digits as its factorization.

10501240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177987178.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 10501240021 its reverse (12004210501), we get a palindrome (22505450522).

The spelling of 10501240021 in words is "ten billion, five hundred one million, two hundred forty thousand, twenty-one".