21211000210 has 8 divisors (see below), whose sum is σ = 38179800396. Its totient is φ = 8484400080.

The previous prime is 21211000183. The next prime is 21211000211. The reversal of 21211000210 is 1200011212.

It can be written as a sum of positive squares in 2 ways, for example, as 17070206409 + 4140793801 = 130653^2 + 64349^2 .

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

It is a super-3 number, since 3×21211000210³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10), and also a Moran number because the ratio is a prime number: 2121100021 = 21211000210 / (2 + 1 + 2 + 1 + 1 + 0 + 0 + 0 + 2 + 1 + 0).

It is not an unprimeable number, because it can be changed into a prime (21211000211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060550001 + ... + 1060550020.

Almost surely, 2^21211000210 is an apocalyptic number.

21211000210 is a deficient number, since it is larger than the sum of its proper divisors (16968800186).

21211000210 is a wasteful number, since it uses less digits than its factorization.

21211000210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2121100028.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21211000210 its reverse (1200011212), we get a palindrome (22411011422).

The spelling of 21211000210 in words is "twenty-one billion, two hundred eleven million, two hundred ten", and thus it is an aban number.