21030002122 has 8 divisors (see below), whose sum is σ = 31548104676. Its totient is φ = 10513967232.

The previous prime is 21030002111. The next prime is 21030002141. The reversal of 21030002122 is 22120003012.

21030002122 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20403551281 + 626450841 = 142841^2 + 25029^2 .

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

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, 491233 + ... + 532324.

Almost surely, 2^21030002122 is an apocalyptic number.

21030002122 is a deficient number, since it is larger than the sum of its proper divisors (10518102554).

21030002122 is a wasteful number, since it uses less digits than its factorization.

21030002122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033832.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21030002122 its reverse (22120003012), we get a palindrome (43150005134).

The spelling of 21030002122 in words is "twenty-one billion, thirty million, two thousand, one hundred twenty-two".