21121320303110 has 64 divisors (see below), whose sum is σ = 38757395082240. Its totient is φ = 8285141531520.

The previous prime is 21121320303091. The next prime is 21121320303157. The reversal of 21121320303110 is 1130302312112.

It is a happy number.

It is a super-2 number, since 2×21121320303110² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1683369857 + ... + 1683382403.

It is an arithmetic number, because the mean of its divisors is an integer number (605584298160).

Almost surely, 2^{21121320303110} is an apocalyptic number.

21121320303110 is a deficient number, since it is larger than the sum of its proper divisors (17636074779130).

21121320303110 is a wasteful number, since it uses less digits than its factorization.

21121320303110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20661.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21121320303110 its reverse (1130302312112), we get a palindrome (22251622615222).

The spelling of 21121320303110 in words is "twenty-one trillion, one hundred twenty-one billion, three hundred twenty million, three hundred three thousand, one hundred ten".