21211010222210 has 16 divisors (see below), whose sum is σ = 38273167596600. Its totient is φ = 8463659822976.

The previous prime is 21211010222201. The next prime is 21211010222219. The reversal of 21211010222210 is 1222201011212.

It is an interprime number because it is at equal distance from previous prime (21211010222201) and next prime (21211010222219).

It can be written as a sum of positive squares in 4 ways, for example, as 21211007902681 + 2319529 = 4605541^2 + 1523^2 .

It is a super-2 number, since 2×21211010222210² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21211010222219) by changing a digit.

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, 2593028945 + ... + 2593037124.

Almost surely, 2^{21211010222210} is an apocalyptic number.

21211010222210 is a deficient number, since it is larger than the sum of its proper divisors (17062157374390).

21211010222210 is a wasteful number, since it uses less digits than its factorization.

21211010222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5186066485.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211010222210 its reverse (1222201011212), we get a palindrome (22433211233422).

The spelling of 21211010222210 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred twenty-two thousand, two hundred ten".