21300023122 has 8 divisors (see below), whose sum is σ = 36514325376. Its totient is φ = 9128581332.

The previous prime is 21300023117. The next prime is 21300023209. The reversal of 21300023122 is 22132000312.

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

It is a junction number, because it is equal to n+sod(n) for n = 21300023096 and 21300023105.

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, 760715098 + ... + 760715125.

It is an arithmetic number, because the mean of its divisors is an integer number (4564290672).

Almost surely, 2^21300023122 is an apocalyptic number.

21300023122 is a deficient number, since it is larger than the sum of its proper divisors (15214302254).

21300023122 is a wasteful number, since it uses less digits than its factorization.

21300023122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521430232.

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

Adding to 21300023122 its reverse (22132000312), we get a palindrome (43432023434).

The spelling of 21300023122 in words is "twenty-one billion, three hundred million, twenty-three thousand, one hundred twenty-two".