11010340021 has 4 divisors (see below), whose sum is σ = 11035768492. Its totient is φ = 10984911552.

The previous prime is 11010339983. The next prime is 11010340027. The reversal of 11010340021 is 12004301011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12004301011 = 59 ⋅203462729.

It can be written as a sum of positive squares in 2 ways, for example, as 5095960996 + 5914379025 = 71386^2 + 76905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11010340021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11010339983 and 11010340010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11010340027) 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, 12713586 + ... + 12714451.

It is an arithmetic number, because the mean of its divisors is an integer number (2758942123).

Almost surely, 2^11010340021 is an apocalyptic number.

It is an amenable number.

11010340021 is a deficient number, since it is larger than the sum of its proper divisors (25428471).

11010340021 is an equidigital number, since it uses as much as digits as its factorization.

11010340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25428470.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11010340021 its reverse (12004301011), we get a palindrome (23014641032).

The spelling of 11010340021 in words is "eleven billion, ten million, three hundred forty thousand, twenty-one".