21111120112210 has 32 divisors (see below), whose sum is σ = 38490130731312. Its totient is φ = 8336029900800.

The previous prime is 21111120112177. The next prime is 21111120112219. The reversal of 21111120112210 is 1221102111112.

It can be written as a sum of positive squares in 8 ways, for example, as 17021507758369 + 4089612353841 = 4125713^2 + 2022279^2 .

It is not an unprimeable number, because it can be changed into a prime (21111120112219) 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, 30671647 + ... + 31352386.

Almost surely, 2^{21111120112210} is an apocalyptic number.

21111120112210 is a deficient number, since it is larger than the sum of its proper divisors (17379010619102).

21111120112210 is a wasteful number, since it uses less digits than its factorization.

21111120112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62024478.

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

Adding to 21111120112210 its reverse (1221102111112), we get a palindrome (22332222223322).

The spelling of 21111120112210 in words is "twenty-one trillion, one hundred eleven billion, one hundred twenty million, one hundred twelve thousand, two hundred ten".