21210111110010 has 16 divisors (see below), whose sum is σ = 50904266664096. Its totient is φ = 5656029629328.

The previous prime is 21210111109991. The next prime is 21210111110017. The reversal of 21210111110010 is 1001111101212.

It is not an unprimeable number, because it can be changed into a prime (21210111110017) 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, 353501851804 + ... + 353501851863.

It is an arithmetic number, because the mean of its divisors is an integer number (3181516666506).

Almost surely, 2^{21210111110010} is an apocalyptic number.

21210111110010 is an abundant number, since it is smaller than the sum of its proper divisors (29694155554086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210111110010 is a wasteful number, since it uses less digits than its factorization.

21210111110010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707003703677.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 21210111110010 its reverse (1001111101212), we get a palindrome (22211222211222).

The spelling of 21210111110010 in words is "twenty-one trillion, two hundred ten billion, one hundred eleven million, one hundred ten thousand, ten".