21234043122 has 8 divisors (see below), whose sum is σ = 42468086256. Its totient is φ = 7078014372.

The previous prime is 21234043111. The next prime is 21234043169. The reversal of 21234043122 is 22134043212.

It is a happy number.

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

21234043122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 21234043092 and 21234043101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769503588 + ... + 1769503599.

It is an arithmetic number, because the mean of its divisors is an integer number (5308510782).

Almost surely, 2^21234043122 is an apocalyptic number.

21234043122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21234043122 is a wasteful number, since it uses less digits than its factorization.

21234043122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539007192.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21234043122 its reverse (22134043212), we get a palindrome (43368086334).

The spelling of 21234043122 in words is "twenty-one billion, two hundred thirty-four million, forty-three thousand, one hundred twenty-two".