21012303002 has 16 divisors (see below), whose sum is σ = 31672650240. Its totient is φ = 10454791632.

The previous prime is 21012302951. The next prime is 21012303023. The reversal of 21012303002 is 20030321012.

It is a happy number.

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, 1286624 + ... + 1302852.

It is an arithmetic number, because the mean of its divisors is an integer number (1979540640).

Almost surely, 2^21012303002 is an apocalyptic number.

21012303002 is a deficient number, since it is larger than the sum of its proper divisors (10660347238).

21012303002 is a wasteful number, since it uses less digits than its factorization.

21012303002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19357.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21012303002 its reverse (20030321012), we get a palindrome (41042624014).

The spelling of 21012303002 in words is "twenty-one billion, twelve million, three hundred three thousand, two".