21120210210010 has 16 divisors (see below), whose sum is σ = 39327287977800. Its totient is φ = 8156770839616.

The previous prime is 21120210209983. The next prime is 21120210210017. The reversal of 21120210210010 is 1001201202112.

It can be written as a sum of positive squares in 4 ways, for example, as 10586479093969 + 10533731116041 = 3253687^2 + 3245571^2 .

It is not an unprimeable number, because it can be changed into a prime (21120210210017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36414155245 + ... + 36414155824.

Almost surely, 2^{21120210210010} is an apocalyptic number.

21120210210010 is a deficient number, since it is larger than the sum of its proper divisors (18207077767790).

21120210210010 is a wasteful number, since it uses less digits than its factorization.

21120210210010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72828311105.

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

Adding to 21120210210010 its reverse (1001201202112), we get a palindrome (22121411412122).

It can be divided in two parts, 211202102 and 10010, that added together give a palindrome (211212112).

The spelling of 21120210210010 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, two hundred ten thousand, ten".