21143341461 has 16 divisors (see below), whose sum is σ = 30804645888. Its totient is φ = 12793023600.

The previous prime is 21143341447. The next prime is 21143341469. The reversal of 21143341461 is 16414334112.

It is not a de Polignac number, because 21143341461 - 2²¹ = 21141244309 is a prime.

It is a super-2 number, since 2×21143341461² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143341469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 507735 + ... + 547796.

It is an arithmetic number, because the mean of its divisors is an integer number (1925290368).

Almost surely, 2^21143341461 is an apocalyptic number.

It is an amenable number.

21143341461 is a deficient number, since it is larger than the sum of its proper divisors (9661304427).

21143341461 is a wasteful number, since it uses less digits than its factorization.

21143341461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056152.

The product of its digits is 6912, while the sum is 30.

Adding to 21143341461 its reverse (16414334112), we get a palindrome (37557675573).

The spelling of 21143341461 in words is "twenty-one billion, one hundred forty-three million, three hundred forty-one thousand, four hundred sixty-one".