21628065122 has 8 divisors (see below), whose sum is σ = 32462648400. Its totient is φ = 10807182324.

The previous prime is 21628065073. The next prime is 21628065127. The reversal of 21628065122 is 22156082612.

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

It is not an unprimeable number, because it can be changed into a prime (21628065127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421172 + ... + 3427487.

It is an arithmetic number, because the mean of its divisors is an integer number (4057831050).

Almost surely, 2^21628065122 is an apocalyptic number.

21628065122 is a deficient number, since it is larger than the sum of its proper divisors (10834583278).

21628065122 is a wasteful number, since it uses less digits than its factorization.

21628065122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850240.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 21628065122 in words is "twenty-one billion, six hundred twenty-eight million, sixty-five thousand, one hundred twenty-two".