21001200110 has 16 divisors (see below), whose sum is σ = 41238720432. Its totient is φ = 7636800000.

The previous prime is 21001200089. The next prime is 21001200119. The reversal of 21001200110 is 1100210012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001200119) 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, 95459891 + ... + 95460110.

It is an arithmetic number, because the mean of its divisors is an integer number (2577420027).

Almost surely, 2^21001200110 is an apocalyptic number.

21001200110 is a deficient number, since it is larger than the sum of its proper divisors (20237520322).

21001200110 is a wasteful number, since it uses less digits than its factorization.

21001200110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190920019.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 21001200110 its reverse (1100210012), we get a palindrome (22101410122).

The spelling of 21001200110 in words is "twenty-one billion, one million, two hundred thousand, one hundred ten".