21011031100110 has 16 divisors (see below), whose sum is σ = 50426474640336. Its totient is φ = 5602941626688.

The previous prime is 21011031100099. The next prime is 21011031100117. The reversal of 21011031100110 is 1100113011012.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011031100117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350183851639 + ... + 350183851698.

It is an arithmetic number, because the mean of its divisors is an integer number (3151654665021).

Almost surely, 2^{21011031100110} is an apocalyptic number.

21011031100110 is an abundant number, since it is smaller than the sum of its proper divisors (29415443540226).

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

21011031100110 is a wasteful number, since it uses less digits than its factorization.

21011031100110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700367703347.

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 21011031100110 its reverse (1100113011012), we get a palindrome (22111144111122).

The spelling of 21011031100110 in words is "twenty-one trillion, eleven billion, thirty-one million, one hundred thousand, one hundred ten".