21031103242210 has 32 divisors (see below), whose sum is σ = 40149502252272. Its totient is φ = 7904417740800.

The previous prime is 21031103242207. The next prime is 21031103242229. The reversal of 21031103242210 is 1224230113012.

It can be written as a sum of positive squares in 8 ways, for example, as 19992943994409 + 1038159247801 = 4471347^2 + 1018901^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102819937 + ... + 103024276.

Almost surely, 2^{21031103242210} is an apocalyptic number.

21031103242210 is a deficient number, since it is larger than the sum of its proper divisors (19118399010062).

21031103242210 is a wasteful number, since it uses less digits than its factorization.

21031103242210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205844838.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21031103242210 its reverse (1224230113012), we get a palindrome (22255333355222).

The spelling of 21031103242210 in words is "twenty-one trillion, thirty-one billion, one hundred three million, two hundred forty-two thousand, two hundred ten".