21102320122 has 8 divisors (see below), whose sum is σ = 34088363316. Its totient is φ = 9739532352.

The previous prime is 21102320111. The next prime is 21102320191. The reversal of 21102320122 is 22102320112.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15306390961 + 5795929161 = 123719^2 + 76131^2 .

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 = 21102320096 and 21102320105.

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, 405813823 + ... + 405813874.

Almost surely, 2^21102320122 is an apocalyptic number.

21102320122 is a deficient number, since it is larger than the sum of its proper divisors (12986043194).

21102320122 is a wasteful number, since it uses less digits than its factorization.

21102320122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811627712.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21102320122 its reverse (22102320112), we get a palindrome (43204640234).

It can be divided in two parts, 2110 and 2320122, that added together give a palindrome (2322232).

The spelling of 21102320122 in words is "twenty-one billion, one hundred two million, three hundred twenty thousand, one hundred twenty-two".