21030113122 has 8 divisors (see below), whose sum is σ = 31659051996. Its totient is φ = 10477095792.

The previous prime is 21030113119. The next prime is 21030113123. The reversal of 21030113122 is 22131103012.

It can be written as a sum of positive squares in 2 ways, for example, as 21010212601 + 19900521 = 144949^2 + 4461^2 .

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 = 21030113096 and 21030113105.

It is not an unprimeable number, because it can be changed into a prime (21030113123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18979693 + ... + 18980800.

Almost surely, 2^21030113122 is an apocalyptic number.

21030113122 is a deficient number, since it is larger than the sum of its proper divisors (10628938874).

21030113122 is a wasteful number, since it uses less digits than its factorization.

21030113122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37960772.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21030113122 its reverse (22131103012), we get a palindrome (43161216134).

The spelling of 21030113122 in words is "twenty-one billion, thirty million, one hundred thirteen thousand, one hundred twenty-two".