11042351521021 has 2 divisors, whose sum is σ = 11042351521022. Its totient is φ = 11042351521020.

The previous prime is 11042351520997. The next prime is 11042351521049. The reversal of 11042351521021 is 12012515324011.

It is an a-pointer prime, because the next prime (11042351521049) can be obtained adding 11042351521021 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10979023798521 + 63327722500 = 3313461^2 + 251650^2 .

It is a cyclic number.

It is not a de Polignac number, because 11042351521021 - 2⁹ = 11042351520509 is a prime.

It is a super-2 number, since 2×11042351521021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11042351521121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521175760510 + 5521175760511.

It is an arithmetic number, because the mean of its divisors is an integer number (5521175760511).

Almost surely, 2^{11042351521021} is an apocalyptic number.

It is an amenable number.

11042351521021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11042351521021 is an equidigital number, since it uses as much as digits as its factorization.

11042351521021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 11042351521021 its reverse (12012515324011), we get a palindrome (23054866845032).

The spelling of 11042351521021 in words is "eleven trillion, forty-two billion, three hundred fifty-one million, five hundred twenty-one thousand, twenty-one".