20121110223 has 32 divisors (see below), whose sum is σ = 29550355200. Its totient is φ = 12121406976.

The previous prime is 20121110209. The next prime is 20121110227. The reversal of 20121110223 is 32201112102.

It is not a de Polignac number, because 20121110223 - 2¹⁰ = 20121109199 is a prime.

It is a super-2 number, since 2×20121110223² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121110227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226740 + ... + 302742.

It is an arithmetic number, because the mean of its divisors is an integer number (923448600).

Almost surely, 2^20121110223 is an apocalyptic number.

20121110223 is a deficient number, since it is larger than the sum of its proper divisors (9429244977).

20121110223 is a wasteful number, since it uses less digits than its factorization.

20121110223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76231.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20121110223 its reverse (32201112102), we get a palindrome (52322222325).

The spelling of 20121110223 in words is "twenty billion, one hundred twenty-one million, one hundred ten thousand, two hundred twenty-three".