10541243021221 has 16 divisors (see below), whose sum is σ = 11810548491840. Its totient is φ = 9323781972480.

The previous prime is 10541243021173. The next prime is 10541243021251. The reversal of 10541243021221 is 12212034214501.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10541243021221 - 2²³ = 10541234632613 is a prime.

It is a super-2 number, since 2×10541243021221² (a number of 27 digits) contains 22 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 10541243021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10541243021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26083125 + ... + 26484181.

It is an arithmetic number, because the mean of its divisors is an integer number (738159280740).

Almost surely, 2^{10541243021221} is an apocalyptic number.

10541243021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10541243021221 is a deficient number, since it is larger than the sum of its proper divisors (1269305470619).

10541243021221 is a wasteful number, since it uses less digits than its factorization.

10541243021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465684.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 10541243021221 its reverse (12212034214501), we get a palindrome (22753277235722).

The spelling of 10541243021221 in words is "ten trillion, five hundred forty-one billion, two hundred forty-three million, twenty-one thousand, two hundred twenty-one".