21230312002 has 16 divisors (see below), whose sum is σ = 32838803712. Its totient is φ = 10288429920.

The previous prime is 21230311937. The next prime is 21230312057. The reversal of 21230312002 is 20021303212.

It is a super-2 number, since 2×21230312002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086699 + ... + 1106062.

It is an arithmetic number, because the mean of its divisors is an integer number (2052425232).

Almost surely, 2^21230312002 is an apocalyptic number.

21230312002 is a deficient number, since it is larger than the sum of its proper divisors (11608491710).

21230312002 is a wasteful number, since it uses less digits than its factorization.

21230312002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2192913.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21230312002 its reverse (20021303212), we get a palindrome (41251615214).

The spelling of 21230312002 in words is "twenty-one billion, two hundred thirty million, three hundred twelve thousand, two".