21121220103110 has 32 divisors (see below), whose sum is σ = 39629391199200. Its totient is φ = 8094892449280.

The previous prime is 21121220103089. The next prime is 21121220103149. The reversal of 21121220103110 is 1130102212112.

It is a happy number.

It is a super-2 number, since 2×21121220103110² (a number of 27 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 277945955 + ... + 278021934.

It is an arithmetic number, because the mean of its divisors is an integer number (1238418474975).

Almost surely, 2^{21121220103110} is an apocalyptic number.

21121220103110 is a deficient number, since it is larger than the sum of its proper divisors (18508171096090).

21121220103110 is a wasteful number, since it uses less digits than its factorization.

21121220103110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555968056.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 21121220103110 its reverse (1130102212112), we get a palindrome (22251322315222).

The spelling of 21121220103110 in words is "twenty-one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred three thousand, one hundred ten".