21413421123 has 8 divisors (see below), whose sum is σ = 28619371200. Its totient is φ = 14241542568.

The previous prime is 21413421103. The next prime is 21413421131. The reversal of 21413421123 is 32112431412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21413421123 - 2¹³ = 21413412931 is a prime.

It is a super-2 number, since 2×21413421123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21413421093 and 21413421102.

It is not an unprimeable number, because it can be changed into a prime (21413421103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8516413 + ... + 8518926.

It is an arithmetic number, because the mean of its divisors is an integer number (3577421400).

Almost surely, 2^21413421123 is an apocalyptic number.

21413421123 is a deficient number, since it is larger than the sum of its proper divisors (7205950077).

21413421123 is a wasteful number, since it uses less digits than its factorization.

21413421123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17035761.

The product of its digits is 1152, while the sum is 24.

Adding to 21413421123 its reverse (32112431412), we get a palindrome (53525852535).

The spelling of 21413421123 in words is "twenty-one billion, four hundred thirteen million, four hundred twenty-one thousand, one hundred twenty-three".