21310002122 has 8 divisors (see below), whose sum is σ = 32056594500. Its totient is φ = 10624470624.

The previous prime is 21310002059. The next prime is 21310002137. The reversal of 21310002122 is 22120001312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21088557961 + 221444161 = 145219^2 + 14881^2 .

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 = 21310002097 and 21310002106.

It is an unprimeable number.

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, 15264347 + ... + 15265742.

Almost surely, 2^21310002122 is an apocalyptic number.

21310002122 is a deficient number, since it is larger than the sum of its proper divisors (10746592378).

21310002122 is a wasteful number, since it uses less digits than its factorization.

21310002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30530440.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21310002122 its reverse (22120001312), we get a palindrome (43430003434).

The spelling of 21310002122 in words is "twenty-one billion, three hundred ten million, two thousand, one hundred twenty-two".