21000222010 has 8 divisors (see below), whose sum is σ = 37800399636. Its totient is φ = 8400088800.

The previous prime is 21000222007. The next prime is 21000222071. The reversal of 21000222010 is 1022200012.

It can be written as a sum of positive squares in 2 ways, for example, as 20194967881 + 805254129 = 142109^2 + 28377^2 .

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

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: 2100022201 = 21000222010 / (2 + 1 + 0 + 0 + 0 + 2 + 2 + 2 + 0 + 1 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050011091 + ... + 1050011110.

Almost surely, 2^21000222010 is an apocalyptic number.

21000222010 is a deficient number, since it is larger than the sum of its proper divisors (16800177626).

21000222010 is a wasteful number, since it uses less digits than its factorization.

21000222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100022208.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 21000222010 its reverse (1022200012), we get a palindrome (22022422022).

The spelling of 21000222010 in words is "twenty-one billion, two hundred twenty-two thousand, ten".