21105422410141 has 4 divisors (see below), whose sum is σ = 21105819711900. Its totient is φ = 21105025108384.

The previous prime is 21105422410133. The next prime is 21105422410271. The reversal of 21105422410141 is 14101422450112.

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 14068658174041 + 7036764236100 = 3750821^2 + 2652690^2 .

It is a cyclic number.

It is not a de Polignac number, because 21105422410141 - 2³ = 21105422410133 is a prime.

It is a super-2 number, since 2×21105422410141² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21105422450141) 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, 198571186 + ... + 198677443.

It is an arithmetic number, because the mean of its divisors is an integer number (5276454927975).

Almost surely, 2^{21105422410141} is an apocalyptic number.

It is an amenable number.

21105422410141 is a deficient number, since it is larger than the sum of its proper divisors (397301759).

21105422410141 is an equidigital number, since it uses as much as digits as its factorization.

21105422410141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397301758.

The product of its (nonzero) digits is 2560, while the sum is 28.

Adding to 21105422410141 its reverse (14101422450112), we get a palindrome (35206844860253).

The spelling of 21105422410141 in words is "twenty-one trillion, one hundred five billion, four hundred twenty-two million, four hundred ten thousand, one hundred forty-one".