21210013010 has 8 divisors (see below), whose sum is σ = 38178023436. Its totient is φ = 8484005200.

The previous prime is 21210013009. The next prime is 21210013037. The reversal of 21210013010 is 1031001212.

It can be written as a sum of positive squares in 2 ways, for example, as 18999038569 + 2210974441 = 137837^2 + 47021^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21210012982 and 21210013000.

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 3 ways as a sum of consecutive naturals, for example, 1060500641 + ... + 1060500660.

Almost surely, 2^21210013010 is an apocalyptic number.

21210013010 is a deficient number, since it is larger than the sum of its proper divisors (16968010426).

21210013010 is a wasteful number, since it uses less digits than its factorization.

21210013010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121001308.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21210013010 its reverse (1031001212), we get a palindrome (22241014222).

The spelling of 21210013010 in words is "twenty-one billion, two hundred ten million, thirteen thousand, ten".