21012200110 has 16 divisors (see below), whose sum is σ = 41260320432. Its totient is φ = 7640800000.

The previous prime is 21012200101. The next prime is 21012200119. The reversal of 21012200110 is 1100221012.

It is an interprime number because it is at equal distance from previous prime (21012200101) and next prime (21012200119).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012200119) 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, 95509891 + ... + 95510110.

It is an arithmetic number, because the mean of its divisors is an integer number (2578770027).

Almost surely, 2^21012200110 is an apocalyptic number.

21012200110 is a deficient number, since it is larger than the sum of its proper divisors (20248120322).

21012200110 is a wasteful number, since it uses less digits than its factorization.

21012200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191020019.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21012200110 its reverse (1100221012), we get a palindrome (22112421122).

It can be divided in two parts, 21012 and 200110, that added together give a palindrome (221122).

The spelling of 21012200110 in words is "twenty-one billion, twelve million, two hundred thousand, one hundred ten".