10221121210 has 16 divisors (see below), whose sum is σ = 18407493000. Its totient is φ = 4086342976.

The previous prime is 10221121201. The next prime is 10221121217. The reversal of 10221121210 is 1212112201.

It can be written as a sum of positive squares in 4 ways, for example, as 7968954361 + 2252166849 = 89269^2 + 47457^2 .

It is not an unprimeable number, because it can be changed into a prime (10221121217) 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, 242725 + ... + 281704.

Almost surely, 2^10221121210 is an apocalyptic number.

10221121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10221121210 is a deficient number, since it is larger than the sum of its proper divisors (8186371790).

10221121210 is a wasteful number, since it uses less digits than its factorization.

10221121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526385.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10221121210 its reverse (1212112201), we get a palindrome (11433233411).

Subtracting from 10221121210 its reverse (1212112201), we obtain a palindrome (9009009009).

The spelling of 10221121210 in words is "ten billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred ten".