21161223543614 has 32 divisors (see below), whose sum is σ = 39575322772992. Its totient is φ = 8244406188000.

The previous prime is 21161223543613. The next prime is 21161223543667. The reversal of 21161223543614 is 41634532216112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21161223543613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3796319 + ... + 7532229.

It is an arithmetic number, because the mean of its divisors is an integer number (1236728836656).

Almost surely, 2^{21161223543614} is an apocalyptic number.

21161223543614 is a deficient number, since it is larger than the sum of its proper divisors (18414099229378).

21161223543614 is a wasteful number, since it uses less digits than its factorization.

21161223543614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3772712.

The product of its digits is 207360, while the sum is 41.

Adding to 21161223543614 its reverse (41634532216112), we get a palindrome (62795755759726).

The spelling of 21161223543614 in words is "twenty-one trillion, one hundred sixty-one billion, two hundred twenty-three million, five hundred forty-three thousand, six hundred fourteen".