21120100111210 has 32 divisors (see below), whose sum is σ = 38027028372480. Its totient is φ = 8445629728512.

The previous prime is 21120100111183. The next prime is 21120100111213. The reversal of 21120100111210 is 1211100102112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21120100111213) 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 15 ways as a sum of consecutive naturals, for example, 665666367 + ... + 665698093.

It is an arithmetic number, because the mean of its divisors is an integer number (1188344636640).

Almost surely, 2^{21120100111210} is an apocalyptic number.

21120100111210 is a deficient number, since it is larger than the sum of its proper divisors (16906928261270).

21120100111210 is a wasteful number, since it uses less digits than its factorization.

21120100111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48630.

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

Adding to 21120100111210 its reverse (1211100102112), we get a palindrome (22331200213322).

The spelling of 21120100111210 in words is "twenty-one trillion, one hundred twenty billion, one hundred million, one hundred eleven thousand, two hundred ten".