21123453316622 has 8 divisors (see below), whose sum is σ = 31685200649616. Its totient is φ = 10561719766752.

The previous prime is 21123453316613. The next prime is 21123453316631. The reversal of 21123453316622 is 22661335432112.

It is an interprime number because it is at equal distance from previous prime (21123453316613) and next prime (21123453316631).

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

It is a self number, because there is not a number n which added to its sum of digits gives 21123453316622.

It is a congruent number.

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, 2305463 + ... + 6896525.

It is an arithmetic number, because the mean of its divisors is an integer number (3960650081202).

Almost surely, 2^{21123453316622} is an apocalyptic number.

21123453316622 is a deficient number, since it is larger than the sum of its proper divisors (10561747332994).

21123453316622 is a wasteful number, since it uses less digits than its factorization.

21123453316622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891562.

The product of its digits is 311040, while the sum is 41.

Adding to 21123453316622 its reverse (22661335432112), we get a palindrome (43784788748734).

The spelling of 21123453316622 in words is "twenty-one trillion, one hundred twenty-three billion, four hundred fifty-three million, three hundred sixteen thousand, six hundred twenty-two".