21322123002 has 24 divisors (see below), whose sum is σ = 46606768884. Its totient is φ = 7044476544.

The previous prime is 21322123001. The next prime is 21322123003. The reversal of 21322123002 is 20032122312.

21322123002 is a `hidden beast` number, since 213 + 221 + 230 + 0 + 2 = 666.

21322123002 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21322123001) and next prime (21322123003).

It can be written as a sum of positive squares in 2 ways, for example, as 16899740001 + 4422383001 = 129999^2 + 66501^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21322123001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5239393 + ... + 5243460.

Almost surely, 2^21322123002 is an apocalyptic number.

21322123002 is an abundant number, since it is smaller than the sum of its proper divisors (25284645882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21322123002 is a wasteful number, since it uses less digits than its factorization.

21322123002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10482974 (or 10482971 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21322123002 its reverse (20032122312), we get a palindrome (41354245314).

The spelling of 21322123002 in words is "twenty-one billion, three hundred twenty-two million, one hundred twenty-three thousand, two".