21121144234 has 8 divisors (see below), whose sum is σ = 31682649600. Its totient is φ = 10560261036.

The previous prime is 21121144229. The next prime is 21121144241. The reversal of 21121144234 is 43244112112.

21121144234 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×21121144234² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121144199 and 21121144208.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 58584 + ... + 213715.

It is an arithmetic number, because the mean of its divisors is an integer number (3960331200).

Almost surely, 2^21121144234 is an apocalyptic number.

21121144234 is a deficient number, since it is larger than the sum of its proper divisors (10561505366).

21121144234 is a wasteful number, since it uses less digits than its factorization.

21121144234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311084.

The product of its digits is 1536, while the sum is 25.

Adding to 21121144234 its reverse (43244112112), we get a palindrome (64365256346).

The spelling of 21121144234 in words is "twenty-one billion, one hundred twenty-one million, one hundred forty-four thousand, two hundred thirty-four".