21000302212130 has 16 divisors (see below), whose sum is σ = 38513761793784. Its totient is φ = 8241628037760.

The previous prime is 21000302212129. The next prime is 21000302212193. The reversal of 21000302212130 is 3121220300012.

It can be written as a sum of positive squares in 4 ways, for example, as 14302563388129 + 6697738824001 = 3781873^2 + 2587999^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21000302212099 and 21000302212108.

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 7 ways as a sum of consecutive naturals, for example, 19811605331 + ... + 19811606390.

Almost surely, 2^{21000302212130} is an apocalyptic number.

21000302212130 is a deficient number, since it is larger than the sum of its proper divisors (17513459581654).

21000302212130 is a wasteful number, since it uses less digits than its factorization.

21000302212130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39623211781.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21000302212130 its reverse (3121220300012), we get a palindrome (24121522512142).

The spelling of 21000302212130 in words is "twenty-one trillion, three hundred two million, two hundred twelve thousand, one hundred thirty".