21011212100110 has 16 divisors (see below), whose sum is σ = 37827034603200. Its totient is φ = 8402961990496.

The previous prime is 21011212100051. The next prime is 21011212100111. The reversal of 21011212100110 is 1100121211012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011212100111) 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, 190298245 + ... + 190408624.

It is an arithmetic number, because the mean of its divisors is an integer number (2364189662700).

Almost surely, 2^{21011212100110} is an apocalyptic number.

21011212100110 is a deficient number, since it is larger than the sum of its proper divisors (16815822503090).

21011212100110 is a wasteful number, since it uses less digits than its factorization.

21011212100110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380712395.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21011212100110 its reverse (1100121211012), we get a palindrome (22111333311122).

The spelling of 21011212100110 in words is "twenty-one trillion, eleven billion, two hundred twelve million, one hundred thousand, one hundred ten".