21411142141 has 4 divisors (see below), whose sum is σ = 21704445532. Its totient is φ = 21117838752.

The previous prime is 21411142127. The next prime is 21411142153. The reversal of 21411142141 is 14124111412.

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 9400078116 + 12011064025 = 96954^2 + 109595^2 .

It is a cyclic number.

It is not a de Polignac number, because 21411142141 - 2⁷ = 21411142013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411145141) 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, 146651586 + ... + 146651731.

It is an arithmetic number, because the mean of its divisors is an integer number (5426111383).

Almost surely, 2^21411142141 is an apocalyptic number.

It is an amenable number.

21411142141 is a deficient number, since it is larger than the sum of its proper divisors (293303391).

21411142141 is an equidigital number, since it uses as much as digits as its factorization.

21411142141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293303390.

The product of its digits is 256, while the sum is 22.

Adding to 21411142141 its reverse (14124111412), we get a palindrome (35535253553).

The spelling of 21411142141 in words is "twenty-one billion, four hundred eleven million, one hundred forty-two thousand, one hundred forty-one".