21110210221010 has 16 divisors (see below), whose sum is σ = 38195261190936. Its totient is φ = 8400332356608.

The previous prime is 21110210220959. The next prime is 21110210221039. The reversal of 21110210221010 is 1012201201112.

It can be written as a sum of positive squares in 4 ways, for example, as 19905776404921 + 1204433816089 = 4461589^2 + 1097467^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5468964449 + ... + 5468968308.

Almost surely, 2^{21110210221010} is an apocalyptic number.

21110210221010 is a deficient number, since it is larger than the sum of its proper divisors (17085050969926).

21110210221010 is a wasteful number, since it uses less digits than its factorization.

21110210221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10937932957.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110210221010 its reverse (1012201201112), we get a palindrome (22122411422122).

The spelling of 21110210221010 in words is "twenty-one trillion, one hundred ten billion, two hundred ten million, two hundred twenty-one thousand, ten".