21130222210 has 8 divisors (see below), whose sum is σ = 38034399996. Its totient is φ = 8452088880.

The previous prime is 21130222207. The next prime is 21130222213. The reversal of 21130222210 is 1222203112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21130222207) and next prime (21130222213).

It can be written as a sum of positive squares in 2 ways, for example, as 18864747801 + 2265474409 = 137349^2 + 47597^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21130222213) 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, 1056511101 + ... + 1056511120.

Almost surely, 2^21130222210 is an apocalyptic number.

21130222210 is a deficient number, since it is larger than the sum of its proper divisors (16904177786).

21130222210 is a wasteful number, since it uses less digits than its factorization.

21130222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113022228.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21130222210 its reverse (1222203112), we get a palindrome (22352425322).

The spelling of 21130222210 in words is "twenty-one billion, one hundred thirty million, two hundred twenty-two thousand, two hundred ten".