21343000120 has 64 divisors (see below), whose sum is σ = 52918477920. Its totient is φ = 7697217024.

The previous prime is 21343000087. The next prime is 21343000127. The reversal of 21343000120 is 2100034312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21343000094 and 21343000103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21343000127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454899 + ... + 499618.

Almost surely, 2^21343000120 is an apocalyptic number.

21343000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343000120 is an abundant number, since it is smaller than the sum of its proper divisors (31575477800).

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

21343000120 is a wasteful number, since it uses less digits than its factorization.

21343000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954584 (or 954580 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21343000120 its reverse (2100034312), we get a palindrome (23443034432).

The spelling of 21343000120 in words is "twenty-one billion, three hundred forty-three million, one hundred twenty", and thus it is an aban number.