21124213422 has 16 divisors (see below), whose sum is σ = 45498306000. Its totient is φ = 6499757952.

The previous prime is 21124213421. The next prime is 21124213423. The reversal of 21124213422 is 22431242112.

It is an interprime number because it is at equal distance from previous prime (21124213421) and next prime (21124213423).

It is a junction number, because it is equal to n+sod(n) for n = 21124213392 and 21124213401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124213421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135411547 + ... + 135411702.

It is an arithmetic number, because the mean of its divisors is an integer number (2843644125).

Almost surely, 2^21124213422 is an apocalyptic number.

21124213422 is an abundant number, since it is smaller than the sum of its proper divisors (24374092578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21124213422 is a wasteful number, since it uses less digits than its factorization.

21124213422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270823267.

The product of its digits is 1536, while the sum is 24.

Adding to 21124213422 its reverse (22431242112), we get a palindrome (43555455534).

The spelling of 21124213422 in words is "twenty-one billion, one hundred twenty-four million, two hundred thirteen thousand, four hundred twenty-two".