21001120220110 has 16 divisors (see below), whose sum is σ = 38090581409232. Its totient is φ = 8336322529600.

The previous prime is 21001120220081. The next prime is 21001120220191. The reversal of 21001120220110 is 1102202110012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8015693431 + ... + 8015696050.

It is an arithmetic number, because the mean of its divisors is an integer number (2380661338077).

Almost surely, 2^{21001120220110} is an apocalyptic number.

21001120220110 is a deficient number, since it is larger than the sum of its proper divisors (17089461189122).

21001120220110 is a wasteful number, since it uses less digits than its factorization.

21001120220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16031389619.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21001120220110 its reverse (1102202110012), we get a palindrome (22103322330122).

The spelling of 21001120220110 in words is "twenty-one trillion, one billion, one hundred twenty million, two hundred twenty thousand, one hundred ten".