2121323020002 has 24 divisors (see below), whose sum is σ = 4612556470860. Its totient is φ = 704591274240.

The previous prime is 2121323020001. The next prime is 2121323020013. The reversal of 2121323020002 is 2000203231212.

2121323020002 is a `hidden beast` number, since 21 + 213 + 230 + 200 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2014301786121 + 107021233881 = 1419261^2 + 327141^2 .

It is a super-2 number, since 2×2121323020002² (a number of 25 digits) contains 22 as substring.

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 (2121323020001) 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, 209694727 + ... + 209704842.

Almost surely, 2^{2121323020002} is an apocalyptic number.

2121323020002 is an abundant number, since it is smaller than the sum of its proper divisors (2491233450858).

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

2121323020002 is a wasteful number, since it uses less digits than its factorization.

2121323020002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419399858 (or 419399855 counting only the distinct ones).

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

Adding to 2121323020002 its reverse (2000203231212), we get a palindrome (4121526251214).

The spelling of 2121323020002 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-three million, twenty thousand, two".